Great place with an especially beautiful bathroom. I briefly ran into the host once, but it otherwise felt as if I was the only person there. I also loved the desk and ample space in the bedroom.
Really convenient location and low cost. I jogged around lake Merritt every day, and it was closeish to 2 Bart stations, as well as walking distance to tons of bars and eateries.
The only problems are there are a lot of stairs, without any elevator. And the other is access to power outlets (it seems like everything plugs into one extension cord draped around the room from somewhere behind the bed). You have to decide what amenities in the room like water heater, lights, and fan you are willing to live without to get any plugs... And charging your phone by the bed is out of the question.
I was overall very comfortable, and if it wasn't for the stairs (I'm a nomad who travels with a whole office worth of gear) I would eagerly stay in this location again.