I spent 3 days at Kevin's studio and I really enjoyed it. It is spotless clean and Kevin provides for everything you might need, is very responsive to messages and he's a trully friendly host. The studio is not centrally located. There are some options if you are ok with public transport, I'd say better if you have a car. If that is the case- mind parking restrictions in the street. I was unfortunately coming home with a ticket. There is a parking lot nearby though. All in all, great studio if you're planning a trip to SF!