 nothing 
 Location was perfect near to metro station central train station near to Mariahilf street Shopping food street Reception staff was very good when I arrived the checking in procedure took me 5 min only what ever I asked they give to us also the staff smiling all time also when I checked out it took 5 min and they did not charge me more than the price that I got from booking I would stay in the hotel if I visit Vienna again Billa 