If you are looking for a quiet central accommodation this is for you. We spent 9 days in this flat, and we were so happy there. It is very close (200m) to both the underground(U1 line) and the bus (13A).
We were also very close to 3 supermarkets (Hofer, Billa and Spar).
The flat does not have road frontage, and so traffic noise is virtually zero.
The flat was well equipped too. Definitely a very good place!