I had a wonderful experience staying in Madrid with Mercedes and her family. She is very knowledgeable, has great communication, is very friendly, and helpful. The location is great as it is easily accessible from the airport, and has easy access to the rest of the city by metro or bus. I felt very welcomed in her home, and would definitely stay there again when I am in Madrid. It is a clean, nice, and quiet place to stay and relax as well. Highly recommended host!