Actually on the place we met Mauro, Tatiana's friend. He helped us very friendly.
Apartment has great location: quiet street with small traffic, very close to Vien Mitte, it's very fast way to airport and to Salzburg by train; and near green Stadtpark, on walking distance to main sights, including Opera, St. Stephan church and Albertina.
In apartment there is vintage furniture and some kind of old Vien spirit :)