what was nearly perfect FSD 12.3.6 has become unusable on 2018 S. They didnt design this release for legacy Teslas

The software version as such is "fine" (the new "F word"). FSD v12.5.4.1, however, is a serious downgrade from previous versions. Phantom strong braking on the highway and city streets for no reason, faltering at yellow lights, stuttering and jerky slow movement through the simpliest of turns, etc. Dangerous, going to get someone seriously hurt.

HW3 MY: The break neck lane changes, particularly at highway lane openings is a menace make this software a no-go. Plus it tried to kill me once while trying to enter a highway. I feel like this is a step backwards, it's confident, but confidently wrong. I hope we HW3 users get a fresh version at some point, as this is garbage.

FSD is actually good.

Seems great

Much more stable. I’ve been using it for 30 days with regular commutes and it works well. Still has some issues with basics, such as… Merging into traffic Lane changes in heavy traffic which make following route difficult later

I can't even use FSD now because of phantom braking. It's really bad.

Very disappointed to receive such an old and outdated version with my new Model 3 Highlands LR.