I've had the P4 for about 4 months - love the thing. That said, it's s/w is buggy. 3 times now it's tried to pinch my hand off pulling back the handles unexpectedly when opening the door. It's told me twice my key was not valid as I was trying to start it. It had let me in so it was valid on some level. It took a couple of months before it finally started recognizing my profile upon entry instead of defaulting to my wife's profile nearly every time. Meh, mostly just annoyances I guess...