It is great. I own a Model S with autopilot, and have since early 2018. I have driven it across some dozen states, and two Canadian provinces. It is far perfect, but it is very, very good, and makes long drives much less stressful and tiresome.

And there have been at least two incidences that I can recall where Autopilot saved me from a wreck.

I would not choose to go back, and would buy it again without hesitation.