I booked Stuart's place on behalf of my parents visiting from overseas. If you've been to San Francisco, you know the drill... Houses are small (so it can be impossible to host long term guests, even family!), hotels are expensive... We were lucky to secure this place months in advance, and it turned out even better than expected.
My parents loved the place, and had an amazing first Airbnb experience. Stuart was very helpful and responsive, check in was a piece of cake. The unit is sparkling clean, spacious, and is a great place to stay long term—plenty of cookware, silverware and dishes at your disposal. The location is fantastic for the price. It is quite close to the Mission district, about 15min to BART, and everywhere is easily accessible by bus. If you're feeling lazy, you can also do taxi/rideshare, SF is a small city after all. The only downside is the lack of natural light, as the unit is on the basement level, but that shouldn't be an issue unless you plan on staying in during your trip.
In short, I would highly recommend Stuart's place.