The stay at David and Manuela's place was great. Location is perfect and communication with the hosts was easy and smooth. They were also very kind to keep my bag for a few hours after check-out so I did not have to carry it with me the whole day. The apartment is clean and the only small drawback is the lack of natural light - which is not too important if you are not planning to spend the day inside the house and rather be walking around Madrid. I recommend the place for solo travelers or couples.