Solid product so far, with an actual response from customer serviceReviewed in the United States on August 6, 2021
Bought this after a fairly brief look at online comparisons. Installed this system in a 2016 extra long MB Sprinter based RV. Suction mount reasonably secure. Rear camera mounts with UHB tape, and they include an extra piece if you want to move it. Setup was trivially easy. Video quality is good. Video is *not* 4k on the front camera unless you run it by itself; best you can do with all three cameras running is 1440p front and 1080p cabin and rear at 30 fps. That resolution is, however, more than adequate for anything I want to do with the camera. Files are stored time stamped, in mp4 format, with an 'A', 'B', or 'C' at the end of the file name to indicate which camera it came from. Event recorder is a little touchy with factory setting, which is OK. 'Event' files get stored in a separate directory from the continuous ones so they don't get overwritten as soon. You can force the current recording into the Event directory by touching the leftmost button on the top. All in all a fairly sane setup.Cons: No wireless access to the files, let alone live feed. I can sort of understand this as it would increase power consumption, but in an age when your refrigerator has wifi your dash cam should have some kind of wireless capability. I was unable to get the camera to connect to a Linux laptop via USB-C, but the laptop could read the card just fine in its own reader. The screen is pretty small if you want a usable backup camera. To get GPS tagging on your files you have to buy a separate GPS mount... but its cheap. I like the camera well enough that I ordered the GPS mount (which uses UHB tape instead of a suction cup). Rear camera view at night is just black without additional light (pretty hard problem to solve with the camera mounted behind tinted glass -- could put an IR LED on the back of the van I suppose but not sure if the back camera does IR). Side view on the front camera is blacked out at night (again, hard problem to solve when you have full headlight illumination in the center of the field of view, so acceptable).Pro: They actually seem to have a customer service department! I mounted the camera in a vehicle that is over 21 feet bumper to bumper. The 6 meter cable they include for the rear camera, which would be fine in almost any other vehicle, isn't long enough to do any kind of sane cable management in the van. The cable is USB-C on one end, but the end that plugs into the camera is a weird, I assume proprietary 1/16" or so 4 conductor phono plug. It wasn't clear whether a USB-C extender would work. I looked for a longer cable online and there was nothing (except, it turns out, on the Amazon Japan website). I contacted the company via email and received a prompt, intelligible reply; turns out they have a 9 meter cable available in China and Japan, and they are sending one.Unknowns: I haven't been in a position to evaluate whether files will finish saving before the power goes out in a wreck (see another review that mentions this). I am hopeful that the high bond tape mount will help with this if it ever becomes an issue. I am not sure how well the GPS position and speed tagging works, but hope to find out soon. Another reviewer mentioned a problem with the GPS format.All in all seems like a solid product so far, and one of very few solutions if you want a camera looking ahead at the road, another looking at the cop coming up behind you, and a third to show that you weren't texting, weren't speeding, and didn't do anything suspicious.