We had family visiting from Denmark for two weeks. It was my boyfriend's grandmother, who is 86, almost blind, but super healthy alongside his cousin and her husband (mid 20-30's). They had the opportunity to stay at this great apartment, perfect for their needs. Everything was clean,the kitchen was fully equipped (although could need new cutlery and a sharper knife (or knife-sharpener)) and there were fresh and clean linens and towels for all three. The two bedrooms were comfortable, the beds were wonderful to sleep in and the living room offered good space for some down-time.
The kitchen chairs do need to be replaced though, they were old, squeaky wooden chairs that seemed like they could break any second.
One day in the middle of their stay they came home to a fresh smelling apartment with clean linens and new clean towels. Just lovely.
I corresponded with Mark during their stay and he was very communicative and helpful. One of the bedroom-doors got jammed (the nob became loose) and they fixed it right away.
Overall it was a very good experience and I will highly recommend this to anyone travelling to SF. I guess it fits a family budget, travelling 3 or 4 people together. Or two couples.