I was looking for an authentic San Francisco experience, and I found it here. Located directly on Haight St, you're surrounded by life and a unique energy the moment you arrive (and it's not hard to get to either, of course). The mix of long-term and short-term residents makes for a really interesting dynamic and I think I would have enjoyed this more had I stayed longer, though be warned that some of the long-term residents are a bit of an acquired taste
The communal dinners (and, as I was lucky enough to share once, a breakfast) were a fantastic touch, and those who volunteer to cook are quite talented. Incidentally, the dining area doubles as a community space, and so anything from hanging out to seminars can be found there depending on the day.
I'd happily stay here again next time I'm in SF.