The Waymo rides were near-perfect. At one point when a delivery truck was blocking 3 lanes, the vehicle assertively merged over into the free lane to get around. A couple of people on e-bikes were all over the place, but at no point did I feel that the vehicle put them in any kind of danger. Starts, stops, and turns were all smooth. End-to-end time was good, the ride itself was comfortable, and the price was reasonable.
On the other hand the Uber driver picked me up in a Tesla that had regen cranked up. They continually accelerated and decelerated the entire way to the airport, rocking the car back and forth the whole time, as if it were a nervous habit to continually press and release the accelerator or something. I felt sick by the time we got to my terminal.
For me at this point, technology like Waymo can't carpet every metropolitan area quickly enough.
One caveat: I should be able to use it (and, hence, pay for it) anonymously.