Mark's place is fantastic for a stay in SF! Noe Valley is a quiet neighborhood walkable to lots of restaurants and shops (but be ready for a hill workout). Close to Mission as well and drive-able to the rest of San Francisco's sites. The space is simple but comfortable and clean. It's on a quiet street and we were able to find parking (again note that SF is hilly and it sits on a steep hill). Bathroom is small but has what you need and the bedroom is huge and well furnished.
Also Mark is a great communicator and let us check in early which really helped us out.