Sabine's apartment is fantastic and is highly recommended for a stay in Vienna.
It is a lot bigger than the photos suggest and has high ceilings which gives a great feeling of spaciousness.
The apartment itself is well located, being very close by to shopping and restaurant locations while being away from busy traffic. The apartment was very quiet.
While the apartment is not next to the central Vienna inner city area, it is a 10 minute or so tram ride away and the tram comes every 10 minutes so it is very convenient.
Sabine had excellent communication, the check in process was smooth and the apartment itself was clean.