This is the perfect place to stay in Madrid!
The apartment was clean, sleek, and modern and overlooked a busy pedestrian street lined with shops and restaurants. From there it's a short walk to so many awesome things: The Royal Palace, Plaza Mayor, Puerta del Sol, and the San Miguel Market, just to name a few.
Our hosts were so great! When we arrived we discovered a leak in the bathroom from the apartment upstairs, which was not our host's fault. We notified them and within an hour they had the problem solved! We also had some issues trying to get some tickets to a football match and Juan helped us communicate with the courier since we don't speak Spanish very well.
I'd highly recommend staying here!