Crissy was incredibly responsive throughout the process, which was wonderful. My girlfriend and I stayed at the apartment on a Monday/Tuesday in July, and when we booked it this was one of the seemingly-best values available in one of the major parts of the city (SoMa) and the space was exactly what it needed to be for our needs.
It's nothing more than a hotel room, with a nice large shower -- but again, if that's all you're looking for, it's perfect. We spent the entire day out in the city, walking around, with a small place to come home and crash to recharge for the next day. Even though the apartment is street-level, there is an iron gated patio in addition to the front door which adds an extra layer of security to your stay.
The one downside is that I can imagine street noise could disturb lighter sleepers. It was on a main street, so cars were going by at all hours of the night. Neither of us woke up from the noise however, but Crissy provided a bucket of foam ear plugs just in case.
We walked from here to Fisherman's Wharf (long walk) and to Oracle Park (very reasonable walk), so if you're looking to explore the city on-foot and are willing to log plenty of miles doing so, this is a great spot to stay.