Just to clarify our experience at Hotel Opera in Madrid. There are two elevators side by side in the main lobby. We definitely rode the elevator on the left hand side to our room on the eighth floor. It was the top floor as there was a penthouse type balcony off the room. (That room was indeed so-so.) Upon arriving at the eighth floor, the exit door of the elevator failed to open. I rang the alarm bell, and the desk persons soon arrived to open the door from the outside. This was two years ago. We were at Hotel Opera again last year, and both elevators appeared to be working perfectly. This time, we stayed on the third floor!