Consumer be aware. The word luxury should not be included in the description. A more accurate description would be: Rent a comfortable bed in the heart of historic Madrid. Also there is a fowl smelling bathroom on offer with abundant water.
Open the windows at your own risk because you will be pelted by cigarette ash from above, and don’t expect to be able to avoid or mask the neighbors noises because the TV doesn’t work. Make sure that you know your way around lock boxes and are fit and capable of climbing sordid tiny filthy stairs after being greeted by garbage bins (not a host).