We (group of three) spent two nights in Bill's apartment. It was super clean and nicely decorated. Communication with Bill was very swift and friendly. The location is great, right in the middle of Bernal Heights, with supermarkets, cafés etc right around the corner.
The only issue we had is that there was quite a bit of noise from the nail salon next door one morning. Apparently they did some major cleaning there at 5am.
Guests should be aware that the apartment has no daylight coming in and fairly low ceilings, so it might feel a little claustrophobic for some people.
We still enjoyed out stay and can recommend the place!