Jack was a great host and made sure we had everything we needed during our stay. The room was very nice and had a cool view out over part of the city!
His place is in a quiet residential area, a little way out of the centre, but its pretty easy to catch a bus or metro into downtown, or Castro (and no doubt lots of other areas). There are also some nice places to eat and get a drink within walking distance, plus a really beautiful wilderness park called Glen Park that is great for a nice walk / jog.