Franziska is very polite. She replies quickly. Although she was abroad durining our stay, she organised everything and she let pass the key in a convienient place upon our arrival. The flat is 600 m from U-Bahn Margarettenstrasse and it is easy to reach Karslplatz (near the Opera and Stephansplatz).
The flat is much bigger than I thought. It's a stylish flat in an old palace. Very sunny! and a lot of space ca.80 m2. Seems it belongs to the art lover.
For 3 people really a lot of room. I strongly recommend.