Cesar's apartment is in a fantastic location - fun, artsy neighborhood and very close to the three big museums (Prado, Thyssen, Reina Sofia) and the train station. The room was very comfortable, and clean. Cesar was really responsive and flexible about letting us store our bags in the apartment so we wouldn't have to drag them around the city even after check-out time. The room was a bit cold at times (the heater comes on for 3 hours each night), but most old European buildings are drafty, so not surprising. Overall, would definitely stay here again!