This place was amazing. It's a good location and has plenty of space to stretch out in. What the other reviewers say about the front bedroom is true, there is a fair amount of road noise there, and also there is a white noise generator that can help with masking that. If you have any particularly sensitive sleepers in your group, the back bedrooms a very quiet and quite cozy and comfortable!
The location is very convenient to Golden Gate Park, Ocean Beach, and a couple of peaks inside of SanFrancisco at Grandview Park and Golden Gate Heights Park. If you are up for a decent up hill climb workout, within 15-40 minutes hiking distance from the apartment, Grandview Park provides a fantastic view of almost all of San Francisco (under a clear conditions, of course!). And there are many streets within 15-30 minutes of walking with great restaurants and stores. One highlight for us was Ebisu Restaurant, with some of the best sushi we have had in recent memory!
Winnie was very communicative and responsive, she always responded within an hour (typically much less then an hour) to inquires. All in all, this has been one of our best stays in recent memory. Inside the apartment she has some instructions with pictures, and we found those to be very useful and informative.