This is a very comfortable place - although the exterior of the building and the common staircase is a little confronting because it looks very run down. Once inside though, it's a huge space with 3 big and comfortable bedrooms, nice touches for the kids and a big bathroom. There were a few drainage issues with the shower that caused a few puddles, but I'm sure they will get on top of that pretty quickly.
It's a well appointed and well supplied space that is great to see Vienna from. 5 mins walk to the U-Bahn station which takes you virtually wherever you want.