Ding's place met our travel needs and was a good base from which to explore SF. It is clean and correct and the neighborhood feels safe.
The neighbors are very quiet (apart from a yapping dog for a few minutes each day), and we had no issues getting a great night's sleep, which can sometimes be a problem in big city accommodations.
Ding's place is not luxurious or splendid. But it is quiet and comfortable, and has what you need.
Ding was very responsive in terms of communications.
He was also flexible and reasonable, and provided a generous partial refund after there were issues with WiFi.