Between 'it' and the available Enhanced Autopilot, I would probably pick the EAP if the car had FSD 12.3.3.
I did exactly that yesterday. Drove around 400 miles with my family and was planning to use FSD v12 the whole way to try it out, but after the first 20 miles, I switched back to trusty old EAP. Not as “smart”, but sometimes that’s a good thing. I will definitely give v12 a lot more testing when my family isn’t in the car, but on first impression, it seemed worse than v11.
1) Exiting my neighborhood requires an unprotected left, and v12 did the whole thing where it stops way too far back, takes forever to creep up to where it can see, and then… even after we could see clearly and had a huge opportunity to go, it just kept creeping and not going for probably 5 seconds as our opportunity was closing. Everyone in the car started to pucker because we were fairly far out at this point, and a car was closing fast. Either go or freaking stop… this dangerous endless creep behavior reminded me of v10. Finally I hit the pedal and forced us to make the turn.
2) Less than a mile down the road, we have to make a left (literally the first turn after exiting my neighborhood), and it gets into the turn lane before the turn lane it’s supposed to, and there’s a divider between that forces you to turn, so it’s not like you can just get in early and stay there until the turn, so I had to disengage. Never happened in that spot on v10 or v11.
3) I make the left that it failed to make, re-engage, and then it proceeds to go 5 below the speed limit despite having the speed set to 7 above. It sometimes likes to go exactly the speed limit, or even below, and not obey your set max speed like earlier FSD versions. Honestly, one of the biggest benefits of previous versions of FSD over EAP was the ability to go more than 5 over on this two lane highway, but apparently that benefit is gone now.
4) On a couple sweeping curves, it failed to maintain the center of the lane and my left tires were hitting the reflectors on the center line. Standard Autopilot / EAP maintains center on these same curves without issue.
After experiencing all of these issues within a short amount of time, I just switched back to EAP. I could tell it was making my wife nervous and frustrated and I didn’t want to subject her to 6 hours of that. I love that EAP just goes the speed I want, gives me the ability to do automatic lanes changes, and also gives me the ability to require confirmation for lanes changes, so I can just ignore it if I don’t agree with its lane change decision.