This appartment is located at a top location. You can easily access all the highlights in the center by foot and take the underground to wherever you want to go. It is a 2 minute walk to the Karlsplatz station.
The appartment was a bit noisy (one day at 6 they started collecting the garbage containers on the inner court yard which made a lot of noise. We missed a little warmth in the appartment.
Overall, it served us well and we enjoyed our stay.