 Absolutely nothing 
 Everything about this hotel is simply first class Its location is within walking distance of the vast majority of major visitor attractions in Vienna Should you wish to go further then the historic centre it is very near to Karlsplatz Underground Station The Staff from top to bottom are extremely helpful and very warm in their approach to guests The breakfast is first class very difficult not to find something which you like every morning The general ambience of the hotel is simply elegant Rooms are spacious What more could one wish for Value for money in the true sense of the word 