I had a fantastic time in San Francisco. This was the first time I'd used an AirBnB and it couldn't have gone smoother. Check in was easy, the place was clean and I never even saw anyone else for the 3 days I stayed there.
Most of all, the location simply can not be beat and certainly not at theis price. The room I stayed in was small and tidy but I was in town to see the city though, not a room. Easily one if not the most beautiful cities I've ever visited.
During the day, the house was well lit and quiet. There is a club downstairs underneath the building and on the weekends at night, between around 10pm - 2am, the bass does permeate the building. I was aware beforehand and it wasn't a bother to me since I am a bit of a night-owl anyway. If you are a light sleeper or need to be up for an important meeting, this might not be ideal for you. Otherwise, it is a great, very affordable place in the heart of the city.