Carmen's flat is located very close to Madrid Atocha train station. The apartment is very clean and nicely decorated. It comes fully equipped and although not the biggest, it is very comfortable for two people. Once inside the flat is pretty quiet, you don't hear the trains of the street outside. There are plenty of cafes and bars close by and the beautiful parque de retire is only a short walk. Carmen was very friendly and helpful, very quick to respond to messages. There was a problem with the wi-fi when we arrived but Carmen did her best to resolve the problem as quickly as possible. I would definitely recommend this apartment as a nice, clean, comfortable place to stay!