The location is wonderful! The apartment is in the middle of the Mission, with easy access to wonderful restaurants, a few different gyms, and a quick walk away from a BART metro stop.
The apartment is clean and the amenities satisfactory. A couple of days during my month-long stay I struggled with spotty access to Internet and hot water, although neither were the host's fault. My one qualm with the apartment was with the rather thin walls.
On the whole, the pluses far outweigh the minuses for me. I'm happy with the stay and would gladly pick the apartment again.