Now, let's be clear on one thing. This is a bone conduction headphone, for you "BASS Heads" who can't survive without the sonic booms in your ear canals, STEER CLEAR of this. The mechanism for bone conduction simply won't do the bass sound. It is physics. Sonic boom-mi-ness require air pressure change in a low frequency to be felt. This is a bone conduction headphone. Now that we are clear on that, let's move on to the blinding brightness of this piece of sonic tech marvel.
Many reviewers can't explain why and what exactly they like about the Aftershokz Aeropex headphone, I figured this out after about 10 hours of objective listening. It is the really good production of sound in the mid to high frequency. The sounds are very good. I was listening to Unbox Therapy or Mr Lewd in Lewd After, his voice was nicely reproduced on these aeropex. I listen to songs that are more vocals and they are a joy to listen to. For music with a lot of electronic bass, it will not be able to produce the loudness for the majority of low frequency sounds. So, great for vocals, not good for bassy stuff. But that being said, you can still listen to your bassy hip hop or pop music, oh, country music would be excellent, and in exchange for the almost non-existence bass, great mid to high level sound reproduction, you get to hear your surrounding. You can get a pair of open type headphone and hear everything around you, but they are not as light weight or almost invisible (tiny) on your head, which means you can be out door and no one would look at your weird.
One would buy the AfterShokz bone conduction headphone vs other bone conduction headphone because these are really good bone conduction headphone.
One would get a bone conduction headphone for the following reasons:
1. Most important one - you want to keep your ear canals open so that you can hear sounds in your surrounding, like when you are at home and you want to keep your ears open so that you can hear your family calling for you, or for safety reasons, you need to be aware of your sonic environment, you don't want to cut your family off, you want to know if your co-worker just said hi behind you and needed your help, or you are out door and it is generally want to be aware of your environment. For this reason also, you would not be using these to listen to your music at a high volume, it would defeat the purpose of having these.
2. you don't want a headphone that covers your ear - over the ear headphones gets too hot too quickly, or if you get sweaty, you don't want 2 ear cups on your head to make things worse. you don't want stuff in your ear canal, it also gets hot and irritating.
This is great for calls, very clear for the other caller.
Super fast blue tooth connection. For my iphone 7 plus, it is recognized within 3 seconds once it is turned on, no struggle.
I talk to my co-worker all the time with this on my head while my music is playing softly.
Area for improvement: Adjustability - please design something to go on the ear pieces on each side so that they can achieve slightly different rest attitude on the ear. There are certain position that these ear pieces can better conduct sound, mostly in the pitch attitude, pulling up the back band, which causes the ear piece in the front to pitch down, which makes better contact, or forces the ear pieces to move closer to the bones in the ear to achieve better reception. Also, the headphone sounds better when I use my hands to bring the part behind the ear closer to my skull behind my ears, so, I tried to use a long hard and to try to pull them closer, but that was awkward, so, may be the Aftershokz engineer can come up with a variable tie band that contours the skull would be great.
Battery life - this can be improve a bit more, it just lacks a bit. But I understand this might not be a good thing since it will make it heavier with a larger and longer life battery. It is really light now, I have them on for 8 hours and never feel anything on my head. They should last 8 hr non stop playing at 50% volume.
What I really like about this is that since I have them on my head all day at work, music is always playing, I can just answer calls with the multi function button on the left ear piece.

I've had these for over 2 years, and I love them. There are a couple minor gripes, but nothing that I'd consider a deal breaker. I can use these while I'm driving and hear my phone calls, GPS directions, and other audio much more clearly than if I were to just rely on my phone by itself. Plus, in-ear headphones are not allowed while driving in my state, and it's also a "hands-free" state, so this gets around those problems. Audio quality is very good. There was even one time I forgot I had music playing when I walked into Walmart, and I thought for a moment that they were playing one of my favorite songs over their in-store radio or whatever, and it weirded me out. Just doesn't have the best bass, but that's fine for me. Noise cancellation is non-existent, but that's just the nature of the technology, so I don't actually consider that a flaw against it. You're supposed to be able to hear other things around you.
The one thing I do consider a flaw in it is the mic quality. It's pretty bad, but oh well.

I work remote primarily and am on and off the phone and remote meetings throughout the day. I often times forget to take my standard earbuds out when I would get off of a call and an hour later realize it and take them out (which, if you've experienced silence for an hour due to inactive earbuds in your ears for long periods of time, you know...this gets really old/annoying) and, Murphys law, would receive a call shortly after, so I would have to put them back in my ears. And the cycle continues. If open ear devices were not an option, it wouldn't be much of an issue, and I am not complaining. But...using this bone conduction headset is the answer to this annoyance. I put these on my head when I log on in the morning and don't touch them til I log out of work (and im getting an average of 9-10 hours of heavy use before the baytery states that i need to charge soon). I DO notice that they are "there", but it's not uncomfortable or annoying at all. I just kindof get used to it. As far as sound quality, I have asked numerous people how the sound quality is, on their end and they all say it sounds great. I can hear them without any issue at all (just be aware if you are in a noisy environment, there isn't an open ear headset in the world that will "cancel" outside noise, obviously). As far as music is concerned, I do sometimes listen to music when I'm not on a call or in a meeting and these sound great. As everyone else has said, by the nature of the open ear concept, you aren't going to get super high quality music and bass with these. I'm really unsure if technology will ever be able to defy basic sound wave physics. Even if you put in the provided ear plugs, you're still going to get better, deep quality music with any middle-of-the-line earbuds. But the sound is actually prominent enough that if someone comes up to me while I'm listening to music at a relatively lowest volume, I choose to pull the headset off so that I can clearly listen to them. It's not that I can't hear them, it's more that it's distracting...kindof like the conversation is in the background of the music. I should also mention, if you want to "blast" music or calls, you will A: Feel a bit of a tickle/vibration on your temples. And B: people sitting close to you, in a quiet room, will be able to somewhat hear sounds coming from the headset. My friend says that she can hear that I'm listening to music (when the volume is turned up high) but she "can't really make out what it is". So, in conclusion, for music, these aren't Bose or Beats quality but you can still enjoy music in a relatively quiet environment. *I thought of a great idea for this: If you keep these on (for calls only) and ha e a different, better sound quality set of ear buds in, for music only, you can listen to great sounding music with your standard earbuds and pause the music when a call comes in, and since your ears are plugged, the call will have much deeper quality sound. I've tried it and it is amazing, but just more devices to use, so I haven't done thi more than once. For work (for calls and meetings) these are great and is kindof like just having the phone/meeting "in your head" and readily available at a moment to notice without having to fiddle around with earbuds or a traditional headset. As for the price: If you're using these for work (or an activity that you commonly partake in...Co sider how much you'll use them and if it's worth it to you. I use these for 8+ hours, 5 days per week...they are definitely worth the investment to me.

Man let me tell you what, if you've never owned bone conduction headphones before, start here. Let me also tell you that if you have owned bone conduction headphones before, namely any other pair of aftershocks, don't upgrade to these. Here is the rest of my review.
You know, I'm a blind person, and so when I first heard of bone conduction, I was super interested. Keeping my ears open while also hearing audio from my phone was something that sounded super cool... I could be walking down the street and hearing siri give me directions plus be aware of all traffic around me. I never even thought about using them for exercise, although I eventually figured out that they worked amazingly for that too.
So anyhow, my first experience with aftershocks was their titanium headphones. I bought them, put them on, and was hooked. I would say I wore them on my head for 85% of my life from that point on. I listened to music on them as I ran at track practice. I listened to my stopwatch announce the time on them while I ran on the treadmill. I listened to guided workouts through them as I hurled myself in fifty different directions in the name of cardio. I listened to my phone tell me what bus stops I was near while riding so I would know when to pull that cord and get off. And all the while, I was still aware of everything else going on around me.
Eventually mine broke, though. I had sweated so much while wearing them that the rubber pad on one of the earpieces had come unglued. But they were such an essential part of my life now that I had to order another pair. But I looked around first, and saw these. So I decided to upgrade.
I purchased these during prime day, so I actually got them for $129. It was a nice bit of savings. A few days later they showed up at my door, and I opened up the box to see another box. And I was amazed. Never in my life had I seen someone package a product so well, even Apple with their iPhones. The design of the box was ingenious, the way things were placed into it was so ergonomic, it was just a great unboxing experience I'll never forget. I got the Aeropex themselves, two! magnetic chargers, a rubber carrying case, inside of which were some earplugs, and a sport belt to carry the whole shebang around.
I was excited to try out the Aeropex so I stuck them on my head. And right away I noticed a difference. The titanium model was mainly composed of small square conductors that rested in front of your ears, but these earpieces seemed like they were aerodynamically designed to fit as perfectly against your face and be as unobtrusive as possible while still providing exxcellent sound. They achieved their goal for sure. The sound quality on these is a decent amount better than the older model.
Just like my old pair, I never take these off. It's awesome to me how simple they make my life. I keep these on constantly, and always paired to my phone. When I get a text, I hear the notification on the Aeropex. When I get a call, I just press the multipurpose button on the left earpiece to answer it. Never even have to touch my phone. I can also just hit it again to hang up. And they last forever on one charge too, as they go to sleep if they aren't receiving any audio.
But, while these things are just spectacular, I do not think they were worth the extra $70 I spent on them over another pair of titanium ones. You can get almost as good of an experience with those, so if you want to save some money, I assure you, it's entirely possible. But, if you do decide to pay for these, you will not regret it. I can't live without them. Heck I even have a wired pair that I plug into my laptop and use for hearing my screenreader in class as I take notes as I hear the professor talking at the same time. It's super cool.

First things first, I hardly EVER write reviews. Way too busy, and I don't typically care enough. Here's a short and sweet summary: if you can fit the extra $160 into this month's budget (maybe no fast food, pizza, or coffee...whatever), don't hesitate - you won't regret it.

Next, here's some helpful info from the included manual:

Wireless range: 10 meters (honestly, I get better range than that...I've used them from downstairs in the opposite corner of my house from my phone)
Continuous play battery life: 8 hours (they must mean streaming to two devices simultaneously and nonstop, or maybe talking on the phone for 8 hours, because I wear and use it all day from 6am until around 9pm and have only charged it at night - it has never died).

...now on to why I love these things. I am a previous owner of the Trekz Titanium. I tried the Trekz Air but didn't buy them. I was waiting for a unit that handled dual Bluetooth devices and was waterproof - Aeropex was what I was waiting for.

Cons: You already know this, bone conduction headphones can't replicate the amazing bass of an expensive pair of earbuds or cans. THAT SAID, when you're under water (these are waterproof) or wearing earplugs these things easily sound at least as good as a "decent" pair of headphones (like $20-40 range...more than adequate unless you are an audiophile). WITHOUT earplugs in, with open ears that are alert to your surroundings, I'd say these are the same quality "ish" of stock Apple iPhone earbuds. Maybe a bit less.

PROs:
1. These have the best battery life of any wireless headphones I've used.
2. I now have a headset that simultaneously connects to my work laptop for Skype meetings and my iPhone for personal stuff. Amazing. No more multiple headsets. Mic is great. Clarity is better than my Plantronics.
3. Sound quality is great. Better than Trekz Titanium, can't speak for Air. The feeling that there is music playing that everyone else hears BUT THEY DONT is pretty amazing. I get to work or exercise to the music that keeps me going, but I don't have to worry about not being alert. No, these don't have great bass (without earplugs in). But as someone who enjoys dubstep, I can at least say I enjoy my music, still. The benefits far outweigh this minor drawback, trust me.
4. Vibration (the tickle common to bone conduction) is dramatically improved, as is sound leakage. People don't hear these things unless they are cranked.
5. Touching on something mentioned in my one and only "Con" - if you want noise cancelling headphones, it would be tough to find a better pair. Since you can wear the highest grade earplugs with these things - THEREBY *ENHANCING* THE SOUND - they effectively replace any other noise cancelling headphones. AMAZING.
6. I love, love, love the charging port. The magnetic charger just snaps into place and works - I now wish every device had a charger like this. BONUS: they give you two in the box, so you have one for home and one for work.
7. Since this is a relatively "new" technology, it's a great conversation starter, and everybody loves it. When you tell them to plug their ears (and suddenly they hear it BETTER) the facial response is like magic.

...so there you have it. I will likely not review another product for like ten or more years. But you, dear reader, I hope this pushes over the edge, if you're on the fence. These things are great. I have worn them all day, every day, since purchase (manufacturer warranty of two years btw) and they are comfortable and so convenient.

Hope this helps!