Leticia is one of the best AirBNB hosts we have had - we've been all over the world & country w/ AirBNB, too. I did not personally meet her (unfortunately), but a member of our group met her and received personal food, drink, walking, and sightseeing directions from her that all turned out to be excellent.
Their basement apartment is cozy. We were out and about all day every day (like you should be in SF!) so the queen bed and sleeper sofa, little bit of TV/Internet, and nice shower worked out just fine for the three of us.