We stayed one short night at Irina's place. We didn't meet her in person, but were welcomed by her housemate Greg. He was very nice, gave us advice (recommended us a very nice burger place nearby, "Mo's"). The house is a bit old, but very well located, in the Italian area, and 20min walk from Fisherman's wharf, which is very convenient. Filbert steps and the coit tower are very close as well. The room was clean, and quite spacious. One bathroom to share in the house. We highly recommend Irina's place.