Yann is a very good/attentive host! Super nice guy who knows the city well. The room is kind of its own unit. It is the basement to the main house. The basement did get very cold and you cannot control the heat. Yann provided us with a space heater --- be aware of that if it does get cold.
Great value in SF and is perfect if you are traveling on a budget. A car is necessary if you intend to travel around the Bay Area because the location is in a residential area away from downtown.
Simple and affordable