Price performance ratio ok!

Image transfer takes a little when you insert reverse gear. But you get used to it.
Through the rear window looking rather not recommendable in the darkness, except with additional (separate) infra red LED's on the outside of the vehicle. (For outdoor installation ensure better)
Unshielded cable betw. Camera and screen, radio reception may interfere when it is placed near the antenna.
Self pad for mounting the screen is not worth anything, the first rays of sunshine, destroy any adhesive strength. Better the foot of the screen mounted directly with mounting adhesive on the vehicle.