The fact of the technology is that while imperfect, it is absolutely a marvel, and incredibly useful. I will never drive home again after having a beer after work, or when I'm tired after a long day. I can only attribute the angry skepticism in the comments to willful ignorance or lack of in-the-seat experience. I use it everyday, it drives me driveway to parking with only occasional interventions (per week!).
I'll throw in that my wife hates it (as a passenger or driver), but she has a much lower tolerance for any variance from expected human driving behaviour (eg. lane choices, overly cautious behaviour around cars waiting to enter traffic, etc).