Michael's place is in the heart of Vienna, and is close to public transport, shops and markets. The apartment is small but very comfortable. As a single traveller, this was ideal for a longer-stay (30 days).
At the time of my stay, there was construction going on in the apartment and in the overall building. It would have been nice to have had some communication about this from Michael, rather than being surprised.
Overall, I would recommend Michael's apartment.