Easy to contact; flexible on check-in time; great location. This is basically a large studio with a compact but well-functioning kitchen, which is basically what you want in a month-long-stay, anyway.
The neighborhood is safe and quiet. There are a couple of good breakfast spots and a family-friendly park a short walk away. If you want to live like a true San Franciscan (in the good ways), this place is a great option.
Summary: quiet; reliable; safe; reasonable parking; good location relative to BART/highways; good location relative to all the action in the Mission District.