Great place. Very close to e.g. Plaza Mayor, but in a quiet location, practically no noise at night. Flat was a bit dark, but nicely decorated. Suited our stay (4 friends, 4 days) perfectly. Communication was smooth and we got help when we needed it. Madrid was a fantastic experience, I've never seen so many great looking cafes, bars, restaurants in one place before. Practically all areas are worth exploring, but we enjoyed the places north, east and west of the flat most.