Overall; Great hotel, nice pool and reasonable room.
In details:
Room is okay. Not much of a view (as in staring into a wall), but it worked alright for us. Good enough size for two.
Location is good and the area feels safe. Close enough to many attractions so almost everything is walkable. No noise from the street despite quite at bit of traffic. We were on 3 floor.
Rooftop pool and bar is very good. Not a cheap bar, but nice drinks and a lovely view with lots of space. Pool is not for young children though, as it is very deep in most areas. 135 cm in the shallow end and very quickly rising.
Pool opens at 10.00.
Music is being played all around the rooftop, for our taste a bit too loud.
Lots of chairs though, sun, shade and beds, and good service from most of the staff.
Keycard is used for both escalator and rooms. Caused some minor issues during our stay, but overall worked fine.
We will without a doubt return if ever to visit Madrid again.