I found plenty of issues with this product that I wish to know before I got it, BUT to find that was all my lack of attention.
1- Advertise shows the monitor under water without (buy separately $25) protective case. Finding on the fine prints that is not included - WRONG - They do mentioned about and actually there is a current promotion giving the outer box for free
2- Manual gives you so little about that "extra yellow cable" on where to installed - But I could easily get the details from them if I wasn't so impatient.
3- Manufacture will not have support via phone, email, text, etc, etc. - I didn't think of contacting the vendor via Amazon. They actually read my comments and contacted me to help me out
4- Video will show some jelly effect, but not so bad based on the product price (only pro here) - I did see some but to find that I had the camera not mounted correctly and touching the frame.
5- Manufacture offers phone app only to play recorded video, and an old discontinued/unsupported 3rd party PC app. Incredibly it will work but missing the GPS map - the phone app did work neatly, all i needed was to give a better try. The third party app was just a bonus and the manufacturer has nothing to do with it.
I am very sorry for jumping the guns and not to give the review this product deserves.

Installed the Vsysto Front/Rear Motorcycle DVR on my 2014 Harley. One camera on the front fairing and one under the trunk, the viewer was installed on the handlebar. My first impression was how well this unit is made. Very solid construction, the mounting instructions were very clear and start to finish only took about an hour. The viewer can be installed inside a waterproof clear case or you can mount it without it. Picture quality is excellent both daytime and night time. Oncoming headlights don't affect the quality of the video. Mounting the units resulted in vibration-free excellent videos. I was very impressed as I have DVRs on all my vehicles and the Vsysto with the 170 deg wide-angle cameras does a really nice job (better than my other units). The mounting brackets and cords are very heavy duty and I recommend letting the cords warm up which made the installation a snap. If you mount the DVR in the waterproof case, be sure to remove the unit when you park in a public area or install a case lock to deter theft. I also opted for the GPS addition which I personally prefer.

Easy install on a 2019 Honda Goldwing GL1800. Hid the cameras as best I could and attached the DVR with velcro in the trunk. Would have like to have a higher frame rate and resolution (4k @ 60 fps) but for what I'll use it for I think it's a simple installation and good quality installation.

The only con I've noticed is when the unit is shutoff the last video clip being recorded isn't closed out. I'm still vetting this out but twice when I pulled the memory card to get the videos off of it I could not open the last files being recorded (front and back). This could be an issue in an accident when power if instantly cut off. If it continues with this behavior I'll probably add a power brick to run it and the brick always being charged by the bike. Use a power brick like a mini USB backup battery supply.

Since the resolutions are the same I might swap out my front camera with the rear. Only the front records audio and the front is worthless due to the wind noise. And the back camera is shielded from the wind. That's probably the only thing I would have done differently had I realized it when I installed them.

UPDATE 07-27-2019
Received the GPS antenna. Took me about 15 minutes to install it. Had a perfect location on the bike for it. Camera system is doing great and the Seller has been quick to respond to any questions or issues I've had.

The media could not be loaded. I had been looking at dual cam recorders for about three months before i purchased the VSYSTO M2F model and I'm so glad I did. This cam recorder is as clear as the more expensive models from other companies. I posted a video too show how clear it is. Was going to post front and rear but amazon wouldn't let me post two videos at the same time. I will try later to post front video. I have had it mounted on my motorcycle for about a month now and absolutely love it. Had a little glitch in recording when I first used it and contacted customer support and they were very helpful in helping me figure it out. The problem was my fault but I'm not going to try and explain it too long story. Installation is quite simple as long as you pay attention to what you're doing. I had been in the retail business for 38 years before retiring and had to deal with a lot of companies and i rate this company as top notch in customer service

Got this for my bobber build. Needed a rear camera as I wanted to remove the dorky mirrors. Picture is great and love the fact that it starts recording with ignition. One thing I wish I could change is that the screen goes black after 30 seconds! That was not in the literature...it's not a huge deal as you just tap any side button and it comes right back. Would love it if it just showed me what's behind me all the time. Again. Not a big deal... probably don't want to see the tailgaters anyway... Not sure about the weather proof aspects...it's got lots of buttons and holes for the speakers. Not really going to have the bobber out on a rainy day, but If this is on your cross country cruiser you might bag it at night. The transformer is a bit big but I tucked it in nice and neat under the front forks. Overall great for the price. Would buy again.

Cheers!