I'm a One Medical member. The single biggest draw for me is that you can get appointments the same or next day with little or no waiting time -- where my old primary care doctor was usually booked solid for two weeks or more, by which point I'd either have naturally gotten over whatever I wanted to see him for, or have been driven to an expensive urgent care clinic full of other sick people.

They don't bother with the traditional kabuki dance where a nurse ushers you in and takes your vitals and then you wait around for fifteen minutes before the actual doctor shows, either -- you see a doctor immediately about whatever you came in for, and you're usually in and out in twenty minutes. It's so much better of a workflow that I'm astonished it hasn't been more widely adopted.

That said, they don't play particularly nice with my current insurance, so do your homework.