I have already installed one, but I'm using the Aux input on my stereo. It's a couple of steps thing, not really convenient, but it works when it is really needed. I have hooked it up, to the backup signal.
It's a pain in the axx to fish through the cable, at the connector in the door's post. Yes, there is a big connector popped in there.
Next step, is to install one, at the front of the car.
If you hook it up to a constant power source, it may overheat. At least my Chinese camera, had a bulge in the cable(not sure what it was in there), but it got really hot, if I had a constant power ti it.