I have it on my car, but I haven't been able to really test it much so far. This video convinced me it was a must have though ... For people saying they want to drive and don't want the car driving for them, do you ever sit in bumper to bumper traffic for long periods of time? That isn't driving to me, that is just irritating, so for the car to take away part of that and help you is huge for me.
He goes for long periods of time not touching the steering wheel and letting the car drive for him in traffic. Pretty impressive to me!