My friends and I had a great stay in Wolfgang's apartment. It's about 10mins walk from Wien Mitte Station where you can get a fast (16min) train directly to/from the airport, so it's very easy to get to. It's also only about a 15-20min walk into the centre of Vienna. The apartment itself is very nicely decorated, comfortable and clean. Wolfgang was flexible with arrival/departure times and was an attentive host who communicated very well. The internet is very fast and the facilities are generally great (well-stocked kitchen, iron, laptop to use etc). It's a little expensive for what is ultimately a 1 double bed apartment off-season, but there are 2 sofa beds for extra guests if you have them. I'd definitely recommend Wolfgang's place to anyone who wants a trouble-free stay in a nice apartment in beautiful Vienna.