Even though the square was super busy and noisy, rooms at the back are perfectly quiet at night after the last train. Had to wait a bit for a space in the car park but this was due to los Reyes Magos so probably it is normally no problem. Very good shower and bed. The front desk is only open at limited hours but there is a 24 hour number to call and check-in/out is very efficient. Breakfast next door is good, even if it is a little later to open than ideal (there are also some limited kitchen facilities in the corridor)