Well worth the money. I tried a few cheap ones and decided to go with a "real one". Easy to install since I had existing wiring already. Takes great video. The voice command is pretty awesome. And the collision warning is extremely useful as it stops me from tailgating someone unknowingly.
Small, unobtrusive; Great quality pics/vids; All the driver assistance options are useful
Saving transferring video is confusing using the app; I still haven't figured it out