I had a lovely stay at Carlos & Harralds apartment. Harrald met me for check in, he was very friendly and explained where everything was and gave me information about the local area. Carlos & Harrald messaged me half way through my stay to ask me how I was enjoying my stay and to check if I needed anything. The apartment was clean and bright, the bed was very comfortable and there was a small balcony to sit out on. The wifi was great too. It is in the lively area of Lavapies, with plenty of bars and restuarants, close to the metro and within walking distance of the main sights of Madrid. As a regular visitor to Madrid I would definitely stay here again and recommend it others.