Have bought and installed this in-dash and connected to a back-up camera for our SUV. Not many people notice that it has an video input which automatically shows when there is video input. It is not in the description of the product but it is quite useful. So now the unit is automatically turned on and when I place the car in reverse it shows the picture from back-up camera (after market).
The only problem is that once in a while the unit decides not to turn on and needs to be reset. If you buy this as a portable GPS be aware that the screen is really HUGE.