This is my one. It is small and gives a good image. It is OK at night but needs some kind of light source. The taillights are usually enough. It came already installed in the car as part of system that includes sat nav, dvd, mp3, etc, so I don't know much about it. I just thought it would give an example of a more stealthy install. It's tucked out of the way, you can't see it unless you kneel down a bit, and it gets a good range of view, though it is a tiny bit fisheyed but still effective.