We had a great stay at Marcos and Natalia's apartment! The location was in walking distance to many of the Madrid must see/must do spots. There were a number of restaurants, bars and mini-markets close by and the metro stop was only about a 10 minute walk. Communication was excellent and the apartment was very clean. We always appreciate having a washing machine, so that was a plus. The elevator is great if you have heavy luggage, but it's only 2 flights of stairs if you'd rather walk. We would definitely stay again if we return to Madrid.