The private room is cozy and comfortable and the location in the Mission is a great point to explore the city. The bathroom is upstairs. I didn't spend much time indoors since I was visiting for just 4 days for work.
There is an electric heater to keep you warm, but not sure if that is enough for colder nights. I'm from the tropics so I need all the warmth I can get!
It's an old, charming place, which is typical of SF. There are 2 cute, friendly cats and a small green courtyard outside.
A few odd things like you can't lock the bathroom or the private bedroom from inside. If that doesn't bother you, you should be fine.