I've had my Model 3 for 10 days, and it is fantastic. I can already say it's the best car I've ever owned. I have autopilot and I believe it is a great driver assist tool. But my limited experience so far also leaves me dumbfounded that anyone can feel confident enough in the system to play with their phones for an extended period of time, watch movies, read a book, etc.
My experience is that it is great on a freeway, and in stop & go traffic really reduces my stress level and makes my afternoon commute more enjoyable. It does give me the confidence to briefly take my eyes off the road (only in the right circumstances) to change the music, or adjust a setting. But I would never feel confident to fully immerse myself in something else. A couple details:
1. Merging. The system does not seem smart enough to effectively merge, or allow others to merge. In merging situations I typically take over.
2. Splitting lanes. When the right lane splits into two for the period of time when there is just one really large lane the system centers in between it. When the lane divides into two, now the car is driving right over the dividing line and has "analysis paralysis" and can't seem to decide where to go... eventually abruptly going to one lane or the other (much to the annoyance of drivers behind me). Again, I now just take over in these scenarios.
3. Surface roads. I don't know how people do this. It makes me especially nervous if there are cars parallel parked on the street. The worst is when you're in a wide lane for street parking but no car are parked. The car centers in this large lane. But then as you approach parked cars I get extremely nervous what the system will do, and I take over.
These are just a few examples. But my point is that autopilot is a great assistance feature. It reduces the stress from highway driving. But in only 10 days I've seen the obvious limitations. I really question how anyone can reach a level of comfort to be fooled into thinking they can watch movies, read books, etc.?