I had a very pleasant stay. The room was equiped to the highest standard and the view was fantastic. The staff was also very helpful. I arrived on a Sunday. Believe it or not, it's hard to find the entrance to the hotel. The most convenient train station to disembark is Donauinsel (U1). My check-in was not ideal as I was given a wrong room in the first place and my access card could not be activated throughout the building on a Sunday. I had to wait until Monday morning. The room was fully equiped except shampoo, soap and dishwasher liquid, which you have to go to the reception to get. Other than that, the room was quiet, spacious, with large windows (part of the windows opens to provide good ventilation). Four fast elevators facilitate the access to the room and I noticed no waiting time. My only negative remark has to do with the staircase. I used the staircase twice and I noticed that all doors to the floors are locked! Even the door to the ground floor. As a result I had to call the reception to let me out the staircase twice. I was worried what would happen in the event of fire but I was reassured that the exit is at -4 level.