Visiting SF for the first time, we stayed at Anka's apartment for about 10 days. We had a wonderful time there.
First the place is perfectly located, you can walk to lots of different area or easily access public transportation. The street is really nice and quiet, on the very top of the hill (yes, don't try to walk there the first time with your suitcase ;)
As for the apartment, it's spotless, very spacious, bright, and really cozy. If not for the city, I could have stayed in the whole time!!!
You immediately feel like home!
Special thanks to Anka who is a great host.
I was reticent to share someone else's place in the begining, which I had never done on airbnb, but the experience with Anka was very easy going. She is a friendly, helpful and discret person.
She would leave you enough space, and you'd never feel like your are a stranger in someone else apartment.
Also she is really convenient about checking in and out, and she has compiled an helpful list of restaurant and activities to do in the area. (and yes, you've red it in previous reviews, but you HAVE to try Courtney's grocery shop the moment you get there)

I would definitely advice Anka's to whoever wants to have a proper and amazing San Franciscan trip.
As for me i DO hope to be back there someday :)