We had a very nice stay in Vienna. The room was clean and nice. The bed was a bit tiny, especially for my boyfriend. But, I really liked the solution with the electronic keys - it's simple and I think very useful. Further it's nice to have an own shower and sink in the room.
What we actually did not expect was that there would be 4 other parties to whom there would be a room rented to. The whole thing is rather like a youth hostel than an airb'n'b, like we knew it, just the clientele is a bit older.