This is a great location to stay in Madrid. I walked around everywhere, and la Chueca seemed to be more lively on a Sunday night than the rest of Madrid. Even though there are bars and restaurants right outside the building, you cannot really hear it in the bedroom, so noise wasn't an issue for me at all.
Both the hosts and the cats are lovely and very friendly.
The bedroom and bathroom are a little smaller than seem on the pictures, but sufficient for a solo traveler.
Note that the building is naturally quite old and the water in the shower doesn't go through well enough. Seems like it's a structural issue and cannot be easily fixed. Other than that, it's a good value for the money and a nice place to stay :)