Comfortable and sizable space for a couple to spend a few nights in. The apartment is truly a youth apartment, so it's a space decorated and filled with all the stuff of five other flatmates. This wasn't a problem for us, but if you're looking for a space all your own, this may not be it. The room didn't have any windows to the outside.
The room is quite large though and has everything you would need. The hosts were helpful and kind, and the location is great for the metro as well as a nice walk to the downtown area (Rathaus, Volksgarten, Hofburg Palace, etc.). I would recommend the place.