Only works in some roads, and requires you full attention the whole time. Somehow that makes it better. By this logic a car with manual only mode is even better.
I can't understand why limiting it to certain areas is a good thing (geofencing). One limitation of the google waymo system is I believe it still requires pre-measuring of the roads, ie someone had to drive by there ahead of time. Tesla afaik does have the possibility of improvement but in general works without any precomputed scenery.