I've had it do some dangerous things. I was waiting in a left turn lane while the light was red with cars ahead of me. You could see the path vector jumping to the lane to my right which was a straight lane. Then all of the sudden it decided it was going to enter the right lane to go around the cars ahead of me. There were cars approaching in that lane, so I had to quickly disengage. I mean what was it going to do, pass them on the right and left turn in front of them at a red light?
At another left turn, the light turned yellow as the car ahead made the turn. Fsd paused briefly before making the turn and the light turned red. The steering wheel started moving back and forth for a while, and then it decided it was going to take the left through the red light. Brakes.
Generally, it's pretty amazing, though.