Carmen was an extremely friendly hostess and made me feel quite welcome. I was never quite sure who to expect, but there was always someone staying at the apartment overnight, either Carmen or her son. The location is extremely convenient to the Metro and train systems as well as most of the major sights in central Madrid; at a brisk walk I could reach Puerta de Sol in about half an hour. I also appreciated that I was able to lock the room when I was out of the apartment.