The place was really incredible as an alternative to staying in a normal hostel. The staff at the hotel were very professional and helpful. The room itself was beautifully built, the bedding was of the quality of a posh hotel. The showers were very luxurious "rain" style. In all, the room was very well fitted and decorated.
The central location is excellent for exploring Vienna.

My only other comments are that the room has no chairs and besides the wash basins, bed-side tables etc., the only "table" is a shelf to unpack a suitcase on, and while not cramped, the room is also not spacious for 6 people. So while the room is luxurious, it is not a place to "hang out" - but then again, the hotel has a beautiful terrace/cafe on the roof and you are on the doorstep of the 1st district with many options of places to go.