Kafkaesque - menacing complexity. This is a business hotel. As such, one expects less than aesthetically pleasing surroundings. This hotel outdoes itself in that respect. Staff were nice, but faces reflected a rather poor morale... no real pleasant greeting at the desk. Small and large things made the experience poor... a little surprise at every turn... chairs in the lobby with no backs... staples in the laundry with predictable consequences... nickle and dime policies on most every service... very low speed internet without an outrageous extra charge... virtually no room attendance... basically outrageous service charges and prices given the quality received (even for Vienna)... and no option on hotel tip even with bad service...
I rarely see people at the front desk of a hotel complaining, but on several occasions I passed by and heard people complaining and arguing with the staff. I felt sorry for the staff because they were nice young people for the most part and were not responsible for most incidents that led to complaint.
The hotel is located in a business park far from the city center, although with about a five to ten minute walk, one can use the excellent Vienna subway system to get to Saint Stephens (about 5 stops). There is nothing to do around the hotel... nothing... and the landscape has that drab and sterile feel that one would expect in a business hotel in a business park.
The hotel may be okay for business travelers who do not mind bad service, are only staying a day or two with little time spent in the hotel, and who may have meetings in the area nearby. However, anyone wishing even a bit of the ambiance of old Vienna and a modicum of personal service would be advised to stay away.

I stayed in hotel for 5 nights for convention, it is an average hotel and in my view can't be rated with 4 stars, I found that beds are more of children size, but still bigger than in Germany. The staff is helpful, everything was average, so no speacial reactions from my side, I am not sure if there is such info on hotel website, but there is a bus from the airport with stop in front of the hotel, I didn't have time to explore what's around, but there is a nearby supermarket, and there is a room service 24 hours, if I will have to visit Vienna again, definitively this hotel will not be my choice, 15 min walk to the Congress center and you can arrive by metro from the city center for same time