Karin is a great host and keeps his place like a jewel of hospitality. The location is a bit far from downtown SF but the neighborhood and Karin's place are superb. The house and the room are kept extremely clean and in order so if you like clean and comfy places with nice furniture around this is your place but you have to be respectful of a lot of house rules which are necessary to keep the place in such a nice state. Check out other options if you are not that type of person.
I'm certainly looking forward to staying at Karins's place in the future.