Beth and Don are absolutely lovely couple and are very friendly to me. The neighbourhood is super safe and is nice to take 2 to 3 hours to walk around. There is a really nice bookstore nearby (within 10 mins walk). Their daughter Christine is also very nice to the guest and I had a wonderful time with them (and their dogs:) ). The transportation is very convenient to get to the downtown and other attractions. I would definitely knock on your door again when I come to San Francisco in the future!