Joan was so welcoming. I could not asked for a better host. Both went out of there way to make sure my short stay was as pleasant as possible.
The studio is very roomy, comfortable, very clean and very quiet. Bed is very comfy. Plenty of room for any extra suitcases. Home is located in a very nice , quiet and clean neighborhood surrounded by very old tall trees ( St Francis Woods) It is only a few blocks away from public transportation ( either bus #23 or Muni that will take you to downtown San Francisco.
Very easy access from and to the airport if you are flying in.
I would stay at San Francisco Serenity in a heartbeat.
Highly recommended!