I stayed in Room #1 at Jimmy's place for a night. Everything is great, the location, quietness and cleanliness.
The kitchen area is a bit small but still nice, got everything you need if you need to make coffee or your own breakfast.
It's good for solo traveler or a couple. Jimmy's respond to questions promptly, I would say you're in good hands.
Most importantly, the price. Compare with others B&B price, Jimmy's price is totally fair and square.
Definitely will stay at Jimmy's place next time visiting SF area again.