If 6 stars were possible, Rico and Pat's place would earn them all!
The location is lovely--a quiet San Francisco neighborhood with restaurants (check out his binder with recommendations) and a few shops, plus a beautiful hiking trail just above their street that overlooks all of the bay. The inside is wonderful too--they thought of everything you need and keep it as clean as can be.
Add to that--Rico and Pat are incredible hosts who makes you feel at home, with prompt communications and great local tips.