Best accomodation i had in Madrid in years. I stayed 4 weeks at Pilar casa and enjoyed it very much. Very sunny, 3 bedrooms, two of them with much space, big terrace with fantastic views, living room with comfortable sofa and fairly new HD TV and air conditioning, fully equipped kitchen and spacy bathroom. It's also very close to metro and cercanias as well as very close to city center. You can't ask for more.
Pilar was also very kind host, explaining all the details of her accomodation and being open for any questions at any moment. I recommend staying at her for everyone.