We highly recommend Marcelo's apartment. My wife and I have stayed there twice in the past year. It's the perfect introduction to Madrid for first-time visitors and a comfortable home-away-from-home for those who come to the city often. The neighborhood is perfect: within walking distance of both the touristic center, yet it is a real neighborhood with its own special characteristics. Wonderful bars and restaurants. A short walk to the admirable Madrid Rio Park. Close to Atocha train station. And the apartment itself does not have that impersonal, recently renovated and sterile feel of so many tourist apartments these day. This is a flat that has been lived in and you will feel comfortable in.