I spent 3 days in Madrid on business and vacation. The hotel is very good, in a very good area. Service is very friendly and helpful. Very nice rooms and an excellent bathroom (showers are great!)
I only found 2 problems with the room:
1) the heating control was Off/very hot/volcanic/surface of the sun.... no individual regulation, so we had to sleep with our window open during fairly cold nights.
2) the TV system was a nuisance. There is some kind of commercial offering when you turn the TV on, that makes you go through 3 very slow menus before actually watch TV. Nothing too serious.
I would definitely recommend this hotel for business travelling, not for a family vacation.