Wing's apartment felt like staying in a friend's home. It's in a regular residential neighborhood, outside of the city center. You enter through an unfinished hallway that also leads to their family home upstairs. There is a little garden in the back yard with all kinds of flowers, herbs, and vegetables. There first apartment that you stay in has a little deck overlooking the back yard garden. There were a few nice touches like instant oatmeal in the cupboard, milk in the fridge, bread and jam, tea and coffee. Just very home-like and that was nice for us.
The beds were very comfortable, the sheets and towels smelled freshly cleaned, and there were extra blankets in the closets. The apartment was clean. Entry was easy with two separate key codes; one to enter the building and a different one for the downstairs apartment. Wing let us drop our bags off early since our flight arrived a few hours before check in. She was very responsive, friendly, helpful, and just generally pleasant.
There is a 29 bus 3 blocks away and a muni train about a 5 minute walk away. It took about 45 minutes to get to most of our destinations in the city from this apartment. We felt safe walking through the neighborhood, but it is a little off the beaten path and not in a touristy area, so make sure you're comfortable with that.
We really enjoyed our stay and would recommend it to people who want more of a "live like a local" experience while they are visiting San Francisco.