Martha was great. Jacko the dog barked at first (he's protective of his "den") but then was positively lovely; I wish he could have stayed with us. There was no one else staying there at the time, so we had the run of the place and it felt like we practically had the house to ourselves, as Martha stays in another section entirely.
The house has an antique feel, and is located near coffee shops and amenities on Geary St. It will take you time or $ to get downtown, but you can't have everything; on the plus side you're near the Presidio and some of the nicer neighbourhoods in San Fran.
For us, the best was that since we were their first honeymoon couple, Martha provided a bottle of champagne for us on our arrival! I wish we could have enjoyed more of it, but we were on a tight schedule.
Martha let us check out late. She was very flexible and laid-back.