Very pleasent stay, for us the inn worked out perfectly
The main reason I selected this hotel is the location. To get to Yosemite I rented a car at SFO and returned it 5 days later to the car rental location on O'Farrell St. which is a 4 minute walk from the inn. The rest of our stay we used public transportation including the cable cars which was only a block and a half walk. Looking out my hotel room window I could see one end of Union Square and I looked directly at the Westin St. Francis (which I couldn't afford). For us the location couldn't be beat.
The inn itself is a narrow, older, attached building typical for SF. But it was clean and well managed. The front desk people were always helpful and courteous. Our 2 room suite was on the third floor with the living room looking out on Post St. which is a busy noisy road. But the bedroom was in the back away from the street. With the bedroom door closed we couldn't hear a thing including other rooms or guests. My wife is a very light sleeper and enjoyed the quiet. We has the best of both. We could look out the window and watch people walking down the street but close the bedroom door and sleep well. 
The breakfast was pretty good and included hard boiled eggs, pastries,muffins, bagels, toast, coffee, juice... you get the idea. There was also wine & cheese in the afternoons and cookies in the evenings.
Overall I would not hesitate to stay here again. It is an older place but certainly not dated, simply pleasant & small with helpful staff in a terrific location.