A great find in the center of Wien. The sofa bed is large enough for 2 person. Convenient location and only 5 min pleasant walk to westbahnhof station. Peter also gave us very good direction in accessing the apartment.
One drawback is the wifi signal is a little bit weak and you have to stand close to the router in order to get good signal.
All in all, I would recommend this apartment to others when staying in Wien in future.