 Nothing
 Everything was perfect I truly loved my stay there The staff members are absolutely amazing and are ready to assist you with whatever you want The room is exactly as described in booking and is more beautiful than the pictures All what you want for a wonderful stay is available The room s amenities are excellent The location is perfect too I had some work at University of Vienna which is just 5 minutes walk from the hotel A big supermarket is right across the street and several many restaurants are located near the hotel Old Vienna and the city center are just 15 minutes walk Many of the tourism attractions including museums are on a walkable distance I strongly recommend this hotel and would love to stay in it again 