I had to go to SF for a conference (at the Moscone Center), and this place was perfect!
Lots of independence: The host gives the guests a door code to enter and check in without needing to coordinate with her, which was very convenient, especially since my schedule was so hectic while I was there.
Great location: The location was only a 15-minute walk from where the conference was, and less than half a block from a major street, so I always felt safe going in and out of the place.
Clean: Although I spent very little time in the house, the bedroom was very comfy and clean, and the bathroom was always kept clean as well.
When I made the reservation, my main concern was that there were going to be other guests there, and I was concerned about having to share the bathroom with them (especially in the morning, since I'd be in a rush to get to the conference). However, this was never an issue. I imagine that we were in different schedules, because in the morning when I had to get ready to go to the conference, the bathroom was always available and it never caused an issue.
It was a great place to stay, at a very reasonable cost, and next time I go to SF for a conference, I would love to stay here again.