My ~ August 2017 Model S 75D (AP2/MCU1) was just successfully upgraded by the kind folks at Tesla in Austin, TX at the Pond Springs service center. Dropped it off yesterday afternoon, given a Tesla 85D as a loaner. Texted this morning, saying it would be ready @ 3:30PM today....
Some observations -- wow, this thing is fast and smooth.
AP was already "calibrated" when I left. Worked great on the way home. The stoplight recognition did warn that it required a map update, connect with Wifi/etc. but I did not need to recalibrate anything.
Dashcam/Sentry worked immediately. Plugged in a new Samsung T5/1TB SSD that I prep-ed ahead of time. Instantly recognized it.
The visualizations on the IC were already "live" -- road markings, cones(!), trash cans, those little "slap" dividers for HOV/Toll lanes... along with stop lights (showing light colors correctly!).
AP seemed more confident and quick at executing actions in NOA, lane changes. Car seemed more confident in general when using AP through more complex intersections, areas where lanes widened, and other problem areas for AP2.
Will do more testing, obvs. but so far so good!
The Austin Service center seemed... surprised?... that the install/upgrade went as smoothly as it did. They warned that they hadn't done many, and the ones they have done have been a "challenge" in terms of fitment, FW updates taking, etc. -- originally warned it could be 3-4 days in the shop.
I'm happy that it was turned around in 24 hours without any issues!