I haven't seen anything that indicates they don't work well. My anecdotal experience is feeling much safer inside and around them in comparison to vehicles with humans behind the wheel.
The AVs do not work well in the edge cases - exactly in those situations where humans can apply common sense and behave accordingly. Exactly the cases that sceptics seemed to be worried about, and it turns out that the sceptics were right.
I hope AVs will not be allowed on public roads where I live in the next decades.