Melvin is very helpful and punctual, and the location in Madrid is exactly as advertised -- everything you want to see or do is in the vicinity and easy to access. However the place itself isn't a studio apartment, but a hostel, a fact that would have been nice to know before arriving, because for the price, we were expecting a full apartment.
We stayed on the weekend, when the club downstairs became quite noisy late into the night but otherwise the ambiance was very nice. Perfect for a midweek stay, but know what to expect.