12.3.6 was very close to perfect, I miss it. Very smooth, virtually no phantom breaking, handled 95% of all scenarios.

12.5.2.1 is terrible. constant phantom breaking when driving through green lights, phantom breaking on turns, the previous version 12.3.6 was far better.

good.

FSD 12.5.4 is a mixed bag relative to 12.3.6, with a regression or two. Turns involved very jerky and startling corrections, over/understeering. With dumb summon, 2023 MYLR pulled into my garage but inconsistently. Sometimes pulled in 1' from the back wall, sometimes 2-3' short. Also, MYLR remembers garage door even after it's lifted; MYLR refuses to go further. The only Smart Summon improvement would be the ability to target a particular parking space to send it. "Come to me" is pretty cool.

Much better for sure! My only issue is when the light turns green it takes off (chill mode too!). It should wait two seconds or so because where I live people run red lights constantly. Staging also needs to be improved. I was in heavy traffic and in the outside lane. The car waited too long to change lanes for an upcoming exit and it got extremely confused. I had to intervene. Speed control is still trash.

Great

FSD 12.5.4 did great on a 2k road trip. Far from perfect but I was very glad to have the feature.

This version of FSD is smoother, but still requires the same quantity of interventions.