Mark's room is excellent for a short stay in San Francisco. Mark was incredibly flexible, our flight into San Francisco was delayed a few hours and we didn't get to his house till after midnight and this was never a problem for him. Only thing to note was that there was a workshop across the street that seemed to work all hours, some nights banging and crashing till midnight. I'm aware this is out of the host's control but good to note if you're someone who needs uninterrupted sleep. We loved the extra touches, cold bottles of water helped on those scorching hot days.