José and Maria were very friendly and helpful and responded quickly to all our questions. We arrived well after midnight, and they arranged an easy and flexible way for us to pick up the keys.
The flat is located in a perfect location, close to many great bars and restaurants and within walking distance to Plaza Mayor and Plaza de Puerta del Sol, yet it was so quiet in the neighborhood that we woke up wondering if we were really in the center or not! Only thing we would mention is that you should note that there is in fact only 1 window in the apartment, meaning there is not much light.