I had a lovely stay with Matt, and I'd recommend his place to others.
The apartment was clean and uncluttered and looked exactly like the pictures. Matt was communicative before I arrived and asked me to get in touch if I needed anything during my stay. He provided clear instructions for entering the apartment, connecting to WiFi, etc., and I appreciated his guide book to San Francisco.
The neighborhood is quiet and residential and a few blocks from BART/Muni, which made traveling around the city easier. And I had no issue parking my car. The apartment is not in the most central or interesting area of San Francisco, but the neighborhood is peaceful and safe.
One small caveat: noise does carry from upstairs into the apartment, and probably vice-versa. That didn't really bother me, but it felt more like staying in the basement apartment of someone's house — slightly less private than being in a guest house or a standalone apartment.