We stayed for 3 nights and we enjoyed it. The cottage is located in Glen Park - a very nice, charming, little quarter of SF. The BART is within walking distance (10 min). It takes you downtown in 7 minutes. There are several cafés, food-markets and restaurants nearby. The cottage has a great view because it is situated uphill. We only give a four-star-rating because the kitchen is not well-equipped ( lack of pots, bowls and the pan was scratched). The bathroom was not as clean as we would have wished (moldy window and dirty bathtub). Furthermore I would not recommend it to allergy sufferers - there was dog hair on the floor and on the air mattress where our daughter slept.
Regardless we enjoyed our stay!