Nancy's place has a distinctive style to it. It is very well decorated, and brings out the flavor of the Mexican Mission. It is also very centrally located, only 5 mins away from 24th Street-Mission BART station, and there are a lot of Mexican markets and restaurants around Mission Street and Valencia for you to discover. Safeway is also right by the corner. The kitchen is stocked with all kinds of spices you may need, and all kinds of cooking ware you can think of. We stayed here for 3 months over the summer, and truly enjoyed our stay. It's also pretty quiet at night - there's a bit of street traffic as it is in the city, but nothing too over the top.
Nancy is also super knowledgable about the city, and you can ask her anything about the city, and she can also give you recommendations on good food or little gems around town. Also visit her shop along Valencia if you pass by!
Very good price and location for short-term housing. Would recommend!