Waymo's usually something like 50% more expensive than Lyft in SF, in my experience. But the drivers don't tailgate, have colds, listen to your conversation (AFAIK)...I'll generally opt for Waymo now if I have a choice. The biggest problem I have is that it's usually a longer wait due to the smaller fleet size, but if I'm planning ahead, I'll just book one for a given time, and that takes care of it.