I expected this place to be cuter. You can tell it suffers from humidity and I probably wouldn't stay there in the winter.
However, it was clean, well-located, well-equipped, with great wifi connection, and in spite of being in a lively area with lots of parties going on, it was really quiet. And in the heat of the Summer, it stays cool because it's in the basement, so that's GREAT. No AC needed here.
The hosts were most helpful and friendly, very accommodating for check-in and check-out, making us feel welcome.
The location is fantastic, we visited Madrid without ever using public transportation, you really can walk everywhere.
Overall a great stay and an airbnb that I would recommend.