Although we never got to meet Irina, we had a great stay at her place, and Greg was the best host you could hope for! He was very knowledgeble and helped us out with all kinds of things!
The place was clean and confortable, in a very cool neighborhood (the "little Italy" of San Francisco if you) and the bars and nightclubs down the street were so cool and had such great live music our friends insisted we go back 3 times during our stay!