I stayed at the house of Laurence and Luis for a week, the first couple of days for a conference and then with my partner for a few free days to enjoy Madrid. The room is perfect both for working and relaxing. It is situated under the roof in the private house of a lively family. Laurence and Luis are very friendly and interesting people to talk to, and they will help with any needs of their guests. The bus from and to the airport is just around the corner, and from metro O'Donnell you will quickly get anywhere in Madrid. The area is calm, but shops and bars within walking distance. I can absolutely recommend staying there both for tourist and for business trips.