We loved staying with David and Luis. They apartment is so unique--we loved the loft area with the twin beds. Luis was also incredibly accommodating. He gave us tips for the area and made sure to go out of his way to get us extra towels when he realized we didn't have enough. While the apartment is right in the center of the Madrid, it's on a courtyard on the back side of the building and is very quiet. We would definitely stay there again!