With only 3 days experience so far, this review can only give first impressions, but I thought that might be helpful to others. I anticipated difficulties adapting, and didn't have high expectations -- planning to give it a try before investing in a medical grade hearing aid. My experience is only superficial so far, but I must say it has been very positive. The improvement in hearing was immediate. The sound is clear and crisp. It was easier to wear than I expected, and the ear tube provided fit perfectly. I have experienced no discomfort, only a faint itch, and wore it for 6 hours the first day. No troubles using the telephone. A few weeks earlier, before I got the hearing amplifier, I had dinner with friends at a noisy restaurant and only got about half the conversation. Last night I dined at the same restaurant with the same friends (and even more crowded), and everything was much clearer and more intelligible. I would call this a complete success.

I received this yesterday it appears to work well. I am just going to have to adjust to it. The only thing that is driving me nuts its the Itching. I assume I will adjust to it. I am going to be patient with it. I will post updates as time goes on. So far I am pleased with it with a few minor issues
1st 24 hours went well just had to learn to adjust it for the environments I am in at the time. If you have it turned up loud it you will think people are yelling at you. I exercise in the evenings so I remove it during exercise. I know I have some hearing loss.

Update 9/24/2017 The itching has stopped. Got my hearing tested yesterday. Hearing loss in both ears. Ordered one for my left ear. I also ordered from Otofonix the large closed domes for reduced feed back and better amplification of sound. (I do feel they should have enclosed a large closed dome instead of me having to order the Domes from the directly from Otofonix to get full use of the device and this is the reason for 4 stars)
Update 9/25/2017
I really do like this. When talking to someone I can adjust the volume until it is comfortable and not to loud and they just think I am playing with my ear. The weak link is the sound tubes. I would suggest ordering extras and keep them handy. But I suspect if handled correctly the sound tubes will last a decent amount of time. I am going to order 2 of each for the Left and Right ear.
Update 9/27/2017
I am pleased with the one for the Right ear at this point. The one for the Left ear arrives today. So we will see how it works. I did order a hearing aid dryer I will use daily to attempt to increase their life. humidity body sweat and rain water can decrease the life of hearing aids.
Update 9/28/2017
I received the one for the left ear yesterday. My ear canals are two sizes. I have known this for years. I am hearing better I am using the medium closed dome. I hear better with the closed dome if you have a good fit there is zero feed back. I am waiting on my order from Otofonix for my large closed domes I ordered 6 of them to reduce the shipping cost. What I am finding amazing is there has been no itching in my left ear. One thing with the closed dome I am sure I hear better. I am hearing sounds I have not usually heard walking around my office.
I have both set to program 2 Sound Level 4. I am amazed at what I have been missing. Cannot wait to try the large closed dome in my right ear. I am sure it will be a improvement.

According to USPS Tracking the large domes are scheduled to arrive today. So I can give a improved update tomorrow on how they are performing. So stay tuned.
Update 9/29/2017
Well USPS did not deliver the large closed domes. I am disappointed. I understand they will arrive today. One thing I noticed every sound . Including the turn signals on my car is easier to hear.
Update 10/1/2017
Hearing with the large dome are much improved. I am using one in each ear from what I can tell the large domes work better. I do not need a high volume when at home.
Update 10/4/2017
Using Medium closed dome in Left ear Large Closed Dome in right ear. Both set to Program 1 Vol. Level 1. I do not wear at home since I feel my son is yelling when he is not. I just wear now when out of the house. I am getting 8 days off the battery.
Update 10/5/2017
The left battery died after 8 days. Just changed the battery today for the first time.
10/10/2017
I switched to the open Domes over the weekend I believe they are more comfortable. My wife says I am not as loud when I talk now. she says I always sounded mad to people that did not know me. I have been told for 20+ years that I was loud. No telling how long my hearing has been bad.
Update 10/11/2017 The on off switch for these you open the battery door and let the battery hang on the door. Now my battery on one is sticking and has fallen out a time or two. I emailed Otofonix I am waiting for a response to my E-mail.
Response to my E-mail they are going to replace the one with the defective battery door. I just need to ship it to them.
Update 10/10/2017
The replacement arrived with the same issue. I did a simple fix I took a kitchen knife and pressed the battery tab down a little. Works perfect with no problem. I wish they had told me to do that.
Update 10/18/2017
Something I had been noticing and thought it was the PSAH but was not. I was hearing a low pitch beep every morning and could not figure it out. One of my co-workers was in my office and I asked if he heard it. He stated it was from my coffee maker. I did not even know it beeped until I got the PSAH so I really am impressed. Setting are presently at left ear program 1 sound Level 3 Right program 1 Sound level 4 I think this is the ideal setting. Going to change my review to five stars.
UPdate10/20/2018
I put these on in the morning as I head out the door and wear them until I get home. Do they help yes.
Update. 11/20/2017
I am still very pleased with them .I use them more during the week. Not sure how I am doing on Battery life have not really kept track .I know I do not change them that often. But I am very pleased with them.
Update 12/12/2017
I have been using Otofonix since September and they work very well. I can detect a major drop in my hearing when removed. I am Changing batteries about I believe every 7 to 8 days depending on how much I wear them. I forget I have them in most of the time. My wife and son are Loud so I usually remove them when I am home or turn the Volume down a little. But I hear so much better. I have not been out to eat since I got them. But we are having Christmas dinner at a Restaurant this year so I will report how they work in a noisy environment for me. But as of this time I am 100 percent pleased.
Update 12/5/2018
They helped during Christmas Diner with no problem at all. I have reduced the Volume both setting Level 2 and Sound Level 1 in Left Ear and Sound Level 2 in Right ear. My wife and son are both loud but there are time I have trouble hearing them. But if I turn the Volume up I am telling my son to lower his voice. If I need to in public I can always turn them up. Right now I am wearing them 14 to 15 hours a day.

Bought this for my MIL to use in one ear because she just CANT HEAR me talk to her. It was getting irritating that I told my hubby that I give up talking to her and they (his brother & him) can take her to her dr's appt instead. They refused so I decided to get this for her. Because of her arthritis in her fingers and just getting used to it, the little toggle switch can be a bit difficult for her to adjust the volume. I have to adjust it as she complains that it's a bit hard to hear in a room. Overall, I'm no longer yelling really loud or writing things down on paper. The reasons for the minus one star is because it's difficult to adjust the volume (at least for the person not wearing the device) AND that it has no on/off switch. Since it took her a while to open/close the compartment, her battery was on all the time. Then she opened the case too much and the battery would pop-out. We're ok with it and she's getting used to it.

I'm really in the 4.5 star camp. On the five star side, I was impressed that I have gotten two follow-up E-mails. And, the E-mails reitterated their 45 day return policy with no questions. Also, the website with it's supporting manuals and videos are a good resource. I've had it for a week, and I'm still on the original battery. I'm hearing some sounds that I've not heard in years such as the car's directional signal clicking.

The device is very easy to set up. I literally opened the box at 5 PM and was heading to a restaurant at 5:10 PM. The rocker switch is very easy to use. I was really happy to be able to hear the watercress so much better. I was surprised about how many background conversations I could pick up.

The device is also very comfortable. I wear glasses and do not notice the device at all. The ear piece fits well and is comfortable to wear all day.

I purchased the device to test out a 'hearing aid'. I did not want to plunge in and invest several thousands of dollars. So far, I may not even take the plunge.

On the four star side, It is sensitive to wind noise. And although they are clear about the description, I was hoping that I could hear spoken voice a little better. Also, the quality of sound is not like my natural hearing. However, it has been a dramatic improvement. I am curious about the sound quality of a hearing aid.

I only have it for my right ear. I'll likely buy another for the left. And, the fact that I will likely buy another is why I gave it 5stars.

I have had this product for about two weeks. Overall, it performs better than my previous two amplifiers from other manufacturers, particularly in restaurants and other somewhat noisy environments. In truly noisy situations, the amplification is not selective but such is the situation with expensive prescription hearing aids also. I will probably purchase another one for my other ear just to better balance reception. My only complaint, as such, is that replacement hearing tubes (needed every 4-6 months) are rather expensive at about $13 each - not a deal breaker but unfortunate.