We had a great time at Ahmad's place, he is a very friendly guy that's always open to have a chat with you. His place is very clean, his dog really playful and nice and it's easy to reach from San Francisco via Bart and a short walk. We only had one little problem, with the smoke detector the first night and he fixed that right away. He also helped us out with our bus tickets for LA. If you look for a option a little out of the city, with a friendly and helpful host, this is the place!