 To have had air conditioning because the temperature outside was over 30 C So we slept with an opened window and a fan 
 The location is excellent with both bus and U Bahn very close and within 10 minutes walking distance from the Opera We very much enjoyed the way the lobby and breakfast room were decorated The breakfast was excellent and the restaurant was also very good The Hotel staff were very charming and helpful For example my computer had a problem and the receptionist provided me with the address of a Computer Arzt where my problem was solved I would very much like to go back to this hotel for a future visit to Vienna