The best part of this apartment is its location. The 3rd district is great and you can walk everywhere. There is a lot of public transport around as well. If you have a car, which I had, there are two parking garages just down the street.
The apartment is equipped with everything you need to have a comfortable stay. Also, Barbara always replied right away when I needed something or had a question.
I definitely recommend this place to everyone who wants to explore Vienna or needs a place for a longer term.