While this hotel is in a good location and offered at a reasonable price for SF, we cannot recommend staying here. For out-of-towners, you should know this building has no air conditioning. This means that the odors, smoke, and stale air from however many years of guests has made the air extremely difficult to handle. You do have the ability to open your window, but only if you're okay with hearing loud street noises and construction all night. There is not fan in the rooms either.
The mattress is beyond ultra firm, akin to sleeping on the floor. We requested (and were given) extra blankets and pillows to stack on the mattress and try to make it softer. But between the mattress and the air quality, my wife and I were unable to sleep more than an hour. And woke up in pain.
We checked out after 1 night (we had planned on staying 2 nights), and moved into a hotel down the street. The attendant on duty that morning did not want to discuss our issues with the hotel, giving her no chance to even remedy them or keep our business, telling us to discuss with Airbnb instead. She took our key, checked us out, and went back to what she was doing.
This was a very disappointing experience. Look beyond the price and the location and really decide for yourself if these drawbacks are worth it.