Great apartment, only 100m from the airport bus and also really close to most of Vienna's main attractions. The apartment is nicely decorated and the beds are very comfortable. Excellent both for exploring Vienna and for spending a little time at 'home' relaxing. Bring earplugs if you like to sleep with the window open: it can get a bit noisy and the narrow streets amplify the sound.
Johannes was there to meet us even though we arrived very late, and he was happy to answer all our questions.
Would highly recommend this place and I hope to be back someday!