Kepa is really sound and her place is genuinely fantastic. Cool, but comfortable. The location is amazing - Potrero Hill is such a nice area to stay - you get a real neighbourhood feel but can walk to Market Street in under half an hour. The restaurants on the hill are great (especially the French one on the corner - I think it's called Chez Papa) and the little independent shops are nice too. My girlfriend and I stayed with Kepa for 2 nights and liked it so much we tried to extend for a further 2 but she was booked up unfortunately. Thoroughly recommended - there's nothing not to like.