Well, right now I'm with Kaiser (going on 30 years with them), unless I drop "Medicare Advantage" next year, in which case I'll just be on Medicare.
(Which is another discussion topic. Some say that plain ol' Medicare gives you more services and/or for less $ than Medicare Advantage.   Maybe I'll ask for opinions on that later.)

You may have a good point, though, mg. I used to have a lot of dental work and optometry done via university teaching clinics, and they did wonderful work (with all those instructors looking over the students' shoulders).

And I am doing research, including asking around. This thread is part of that. I really am interested in hearing about other people's experiences, good and not so good.