I have used all three versions (AP1, AP2 and FSD Beta) since the day it was first released as AP1 in October 2015.
I use it over 90% of the time which is over 100,000 miles.
Those of us from the early days, know to trust but verify. We saw all the severe "warts" that showed up in each version.
FSD Beta is great, but like the disclaimer states, expect it to do the wrong thing at the wrong time.
Last Saturday I did a straight, 21 hour, 1100 mile trip from Breckenridge, CO to Lincoln, CA. FSD was used except in the two white out blizzard conditions, where 20 MPH was overdriving the road conditions. In the times with fog and sleet, FSD (Actually NOA on the freeway, since I don't have version 11) it saw through the inclement conditions better than I could. I was there, ever vigilant, but vision performed very well.
Driving for 21 hours straight, with minimal fatigue was due to FSD.