I can't recommend Maria and Jose's apartment more highly. I lived there while I looked for a flat in Madrid and it was just what I needed. It is very peaceful and light and airy and full equipped with everything you could want during your stay. It is in a perfect location, very close to the Retiro and it's very easy to get everywhere from there. It is also very close to Atocha which it is perfect if you are taking the airport bus. Thank you Maria and Jose as it was the best place to start my stay in Madrid!