Corinne's place is absolutely brilliant. There're two separate rooms, bathroom and small kitchen - fits perfectly for 4 people. Kitchen is well equiped, so you can prepare meals on your own. Close to the place you can find grocery shop and train station (Wien Rennweg Bahnhof) - there's a really convinient connection from the airport.
Few minutes walk from the place, there's a Vienna Belvedere. A little bit further there're all the other place that you must see in Vienna (about 20-25 minutes of walk to Hofburg, Habsburghaus or Heldenplatz). If you don't want to walk - except mentioned train station, you can easily get to a tram or subway.
Highly recommended!