We and our kids love this vintage apartment so much. It locates 5 min from Wien Mitte station so it is superb easy to reach from/to the airport, whether you take CAT or normal train. We love staying outside touristic area (district 1) but you can reach any attractions within 3 or 4 Ubahn stations, or you can take tram just 2 min from the door.
The apartment is full of old things (but in good condition) from decades, but I feel like a home away from home. The plants and fresh flowers are inspired. All rooms have big windows and full of sunlight during daytime.
We highly recommend you staying here in Wien.