We stayed 4 nights in May 2014 at Angel & Laia's place, were very happy and would stay there again. The place is very central and easy walking to all the attractions in central Madrid. Also, it is literally 1 minute to walk to a supermarket, taxi stands, subway station, and cafe. The apartment is off the street at the back of an inner courtyard and was very quiet during our stay. There's a steep ladder to the bed, so don't enjoy too much vino or you'll sleep on the couch instead...