We had a wonderful time staying at The Cosmopolitan! Our host Adam was fantastic, met us on arrival, and helped us to easily settle in as if the place was our own. He even left a wonderful "care package" for our stay. The place itself is excellent, centrally located (close to Atocha railway station) and near restaurants, supermarkets, the Museum strip (Reine Sofia, Prado etc) and a short walk away from the Buen Retiro Park. The metro station was also just around the corner. The apartment was very clean with plenty of space. If ever we are back in Madrid we would definitely stay with Adam! Highly recommended!