 Nothing really we had some hassles with the door not opening faulty card but was fixed quickly and they even followed up to make sure we were happy the issue was fixed 
 Wonderful hotel in superb location for visiting Madrid historic centre We were able to go back to the room easily to freshen up There is a lift to the Metro about 20 metres from the hotel front door Staff very helpful and have good English compared to my woeful Italian Great breakfast available to midday Rooms super quiet no noise at all which is amazing for a city hotel Do yourself a favour and stay here when visiting Madrid 