Was actually able to use the free night certificate that comes w/ the Signature VISA. A very, very nice hotel. Was treated like royalty at check-in, upgraded to a monster suite w/ a huge bathroom (on a free room!) on the lounge floor. And the lounge... nothing short of spectacular IMO! Comp beer and wine, good food, just awesome! If you're looking for an airport hotel at MAD THIS IS THE PLACE!
Not the place to stay if you want to do the tourist thing in Madrid but if you need a room by the airport this place can't be beat.