Yumi (and Catherine) were accomodating with our earlier arrival.
The location was great with 3 bus lines and the California Cable Car line all within 1 city block walk. The neighborhood was eclectic (and hilly, but it is SF) with lots of shops and great restaurants (check out Toast and Bob's Donuts).
My wife and I felt the building was safe with the locked gate. The room was spacious and comfortable. It did feel a little strange to share a bathroom, but it was not an inconvienience. The room and bathroom were very clean. We did not use the kitchen, but it did have anything you needed to prepare a meal.
I think most of Yumi's residents stay for a longer period of time, but our 5 day stay was comfortable and convienent. This was our first AirBnB experience and I think it was great.