Sample of 1, but driving alongside a Cruise car in San Francisco last year was absolutely terrifying. It was coming up on bicyclists going the same direction, ahead of it, and kept swerving back and forth by four feet or so, depending on whether it "saw" them or not.

It was unable to either pass the bicylists or lurk back far enough that they could go about their own business. Meanwhile it disrupted the flow for all the rest of us regular drivers.

This is not the easiest roadway situation to "teach" an autonomous-driving system, but it's been a known issue for a long time. Not sure why Cruise couldn't get it right.