Ruben's apt is a nice single room flat in a central location in SF, about 10 min with a cab.
We didn't have any kind of trouble during our stay.
I can signal just two little problem we had. The first is at the time pf our arrival, the flight was two hour late and we were not sure that Ruben's collaborator would have expected us, at the and she did and we had no problem finding her.
The second is that there was a lot of noise in the building.