We stayed in Gonzalo's apartment for a week's vacation and found it to be the perfect home base for exploring Madrid. The location is an easy walk to all the major points of interest -- museums, gardens, historic palace, markets, shopping and restaurants. Gonzalo was very helpful with check-in, provided great recommendations, and was easy to communicate with when we had questions. The apartment was clean, comfortable and quiet, despite being located right in the heart of Madrid's city center. We would definitely recommend his place to others, and would book again in the future!