Melvin's apartment is one block over from the main street downtown, it's clean, very basic, exactly as pictured in the photographs. I wouldn't consider it luxury, but I wasn't looking for luxury; I was looking for economy. I would certainly recommend staying there if what you really want is a great location, low price, close to everything you want to see in central Madrid. As others have mentioned, it is in a hostel, but I never felt I was lacking for privacy or comfort. As a fellow Airbnb host, I have to commend him on the efficiency and professionality with which he runs his business.