Oversharing: I've been driving a Volvo XC90 with Pilot Assist and a Tesla Model 3 with autopilot. Of the two systems, I really preferred the Volvo -- but not, ironically, because it was better, but rather because it's
worse.
The Volvo's system is very clearly about 70% there. Sometimes on sharp curves it just misses the lines and drifts into another lane. Sometimes it seems to basically just follow the car in front, which means that it will blindly follow a bad driver in doing stupid things. However, the upside of this is that its weak behavior (and willingness to yield to driver input) makes it so obviously an "assist" system that I would never really put a lot of faith in it, or trust it entirely. Thus to me it's just sort of a better version of the lanekeeping system.
The Tesla, on the other hand, really wants to drive the car. It hates taking feedback from me, and will often boot me out of autopilot mode if I disagree over, say, my position within a lane. It does a much better job seeing lanes and handles lane changes automatically. But: because it's so forceful and doesn't like my input, I find it much more stressful to drive. I don't trust it enough to let it have the absolute control it wants, and find myself missing Volvo's pretty-dumb-but-not-demanding system.