FSD now either hugs the yellow line on the driver side OR attempts to cross the line.

Was very good FSD

Smooth stops and starts. Issues with keeping speed with no one in front driving. Had multiple disengagements for riding the right dotted white line even while cars are next to you in that lane.

12.6.1 on HW3 shows improvement over 12.5.4.2, but lane drift remains an issue. On sharp curves at ~40mph or higher, FSD may fail to turn hard enough, risking lane departure into oncoming traffic if not disengaged—a serious safety concern. Phantom braking, though reduced, still occurs, a regression from 12.3.6. Highway driving and lane changes feel more confident, but one parking lot incident required disengagement. Overall, good progress, but lane drift undermines the experience.

Finally got my car back today and got to use it to drive 30 miles home. NIGHT and DAY from 12.5, super smooth, wheel is not shuddering anymore either. The only criticism I can say is it made some questionable moves that left me thinking wow FSD got some balls. Also while in hurry mode it was changing lanes like a mad man. Might have to try in regular mode, cause HURRY was really hurrying maybe a bit too much

The vehicle will not maintain set speed and continuously decelerates

Really happy with this version. The biggest complaint was the braking at green lights. That seems to have been fixed for this version. While this version is not perfect, it is a large improvement over the previous version.

Stable. FSD has tendency to force getting out of passing lane even when vehicle is trying to pass.