This is a pretty great unit to retrofit to an older car. It's been working reliably for us for a few months now, very handy, great value.
That said, I've got some thoughts if there ever happens to be a V2 model. These are all not a big deal and would increase the price but would be nice:
1. The provided base is relatively large but the 4 screws on the back of the unit are great. It meant I could 3d print my own bracket to convert it to a gopro mount. Bonus was I could level out the unit in the process to account for the curve of the dash. It would be awesome if the unit itself came with a molded bracket that was gopro compatible.
2. Having to disconnect one phone to connect a different one is annoying. It would be nice if it allowed you to have multiple phones paired and once and allow you to select which phone to use for Android Auto/Carplay.
3. It'd be nice if the front facing camera was detachable so you could mount it higher. You want the screen low so it doesn't block your view but then the camera gets low too.
4. The cables included all point in different directions from the right side of the unit. Having those consistent 90 degrees would be a little more polished.
5. A built in light sensor for auto-dimming of the screen would be a nice improvement over the current time-based dimming.
Overall very happy with this - they got a lot of things right, these are just my thoughts for making it even better.