We had a great trip to Vienna and Norbert's apartment was a fantastic base for our needs. The place was clean, well-located (easy to get to from the international bus station, not too far from the airport and perfect for getting into the major parts of Vienna via Wiener Linien networks) and a nice spacious place to rest and catch up on any admin using the free wifi. The facilities are basic, especially if you are planning to self-cater, but essentials are covered (we never used the communal laundry facilities, but good to know that they were there!)
Thanks again for letting us stay at your place - hopefully it will be free for our next trip!