My experience with the recent tesla supervised-but-still-full self drive beta was largely positive. I have a cameras only Y with hw4. I think John Carmack will win his bet. I do think they need regional model modifications though. The way you drive in different places is different. In some places you can't signal that you want to change lanes or people close ranks. In others people make room. It did two stops at each stop sign in places that had no crosswalks, picking some arbitrary distance before the intersection to watch for pedestrians, then it pulled up to look for road traffic. Perhaps not a horrible idea, but humans around here don't do that so it confuses other drivers and pedestrians both.