My husband and I were looking for a central, cute place to stay, knowing we wouldn't spend much time hanging out there. José's place was just what we wanted--the area is walkable, and the setup is unique, comfortable, and cozy, with tons of natural light and a beautiful patio space. We didn't cook, but there's a mini fridge, two burners, and some pots/pans. The bathroom is somewhat open to the bedroom, so it's best for two people who are comfortable with each other. There are some ants/mosquitos, but they didn't bother us--just pack up your food, and José has several options to keep the mosquitos away. José himself was a kind and thoughtful host, offering suggestions, inviting us to watch the World Cup, and quick to respond to texts.
To clarify about the staircase, it's quite narrow and fairly long, making 2.5 full turns. It is inside, and floats one story above José's place, which triggered my fear of heights slightly, but I had no problems with it as José and my husband carried the heavy stuff up and down :)
We will definitely stay here again if we're back in CDMX!