The value for price can't be beat. Seriously, given the cost of Airbnb in San Francisco today, Jerry's place is a great value if you need a long-term place to stay. My wife and I stayed here for a month, and there is no way we would've been able to find a cheaper place.
The apartment itself was very cute, and extremely clean when we arrived. It is an older building so you will have to deal with some stuff you'd expect in an old building: don't overload the electric, for example, and the walls are not that thick so you will hear occasional noise from other units. That's life in a big city.
The location is extremely central to anything you could want to do in SF. There are multiple bus routes around the corner, plenty of Uber bikes and scooters available, and a short walk to Market St. for BART stations and Muni Metro lines.
A note about San Francisco: any central neighborhood you stay in will have people living on the street. Tenderloin, Mid-Market, Mission, SoMa, even parts of the Financial District. It's a sad fact of life in SF, and Tenderloin is no different. If you're familiar with SF you already know this. Homeless people are not dangerous, and you will see them daily if you stay pretty much anywhere in SF. Do not be alarmed.
All things considered I would definitely stay here again.