Yes, they're actually awesome. 'Waymo' has replaced 'Uber' in my vocabulary, e.g. "Let's just Waymo there".
They seem to undercut Uber and Lyft by a hair. Given the longer wait times, and lack of a need to tip, that seems fair. (In San Francisco, they undercut by a wider margin. But human ride shares are more expensive there for a variety of reasons.)
Hmm, I used them this weekend and was comparing pricing. Waymo was cheaper. That said, I wasn’t riding during peak traffic. And in peak traffic, I’d vastly prefer a Waymo. So I get the premium pricing.