The apartment was in a great location to most that Madrid has to offer. It was clean with plenty of room for a family of 4. The check in was great and she gave information about the city.
The only things I didnt like was that the showers were small and the noise at night was extremely loud. All of the people below partying did not allow me to rest much for 2 nights. If you are a light sleeper that will probably cause you problems. It took noise cancelling headphones before I could fall asleep.