We stayed in room 5 in Nikki's house and shared a bathroom with room 4. We were on the top floor
Pros: Although we did not meet Nikki in person she was extremely reliable and quick to reply to all our questions. We were able to store our luggage past check out time in the garage. The bathroom was sparkling clean and so was our room!
Cons: We did not feel safe walking around the streets nearby or taking public transportation after dark. It takes around 45 minutes to get to the center of San Fran using public transportation (bus or light rail). The front door jams, it was very difficult to lock the door using the automatic lock. The walls are extremely thin, we could hear the entire conversation of the room next to us (room 4) and the bathroom activities.