Overall a great base from which to explore Madrid. The host had a great guide online with recommendations and the nearest metro stops pinned. He was also very responsive to our requests. It's a convienent location, with lots of restaurants, bars, and attractions nearby.
The space is comfortable and clean, but nothing fancy. The bathroom is compact, so larger people will probably feel a little cramped in the shower. We also found that if the shower is on full blast, the drain has a hard time keeping up with it. Other than that, we had a good stay and enjoyed being near to everything in the city.