Excellent little sudio! The perfect location for Madrid. Located in a hip little neighborhood and a metro stop is super close.
Comfortable bed, and spacious for being a studio. The only slight downside is that the front door opens up into a courtyard, and in the evening you can hear noise from the surrounding neighbors. It seemed to quiet down around 10:00-10:30ish. Really only an issue if you want to go to sleep before that, as you can still hear it even with the windows closed.
Carmelo is an excellent host, and prompt in his meeting time upon your arrival. He is also very helpful in guidance regarding getting around the city and sights to see.