I very much enjoyed my Dec. 2021 stay at Ponge's house. You stay in a room with a bed, work desk, bookshelf, dresser, closet, and WiFi. There's an adjoining bathroom. The shower gets hot quickly. I'm about 6'1'', and I fit in the bed without any problems and slept very comfortably.
The room is reachable down a flight a stairs. For anyone who is reasonably healthy, the stairs won't be a problem. But my 85 year old grandmother probably couldn't handle them. A heater quickly gets the room piping hot (maybe some reviewers who said the room is cold didn't notice that the thermostat is outside the room.) I did very light cooking in the kitchen and stored things in the fridge.
As for the area, it's quite charming. There are restaurants, cafes, ATMs, a laundry service, various shops, some bars, and a little public library with an outdoor recreation area -- all reachable within a minute or less of walking. There's also a grocery store a block away that sells anything you need, including things like pre-made sandwiches and meals.
Access to public transportation is good. There are at least two or three nearby bus lines, and during my 11-day stay I took the bus everywhere, including to the airport. One of the lines drops off/picks ups at a station that takes maybe 30 second to walk to, so I took that bus everywhere - sometimes to connect to other buses and sometimes even late in the night, and I never had any problems. The biggest major nearby street, as far as I know, is Mission St. It's about a 5-10 minute walk, or maybe 1 minute bus ride.
It was a good stay, and I'd stay at Ponge's again.