My family and I stayed in this apartment and we were very happy with it.
It's very close to sightseeing and transport options. And though the apartment is in a quite central part of Vienna, it was surprisingly silent at night.
The apartment is clean and comfortable and well-equipped, making the stay easy and relaxing.
The cooperation with the host, was very pleasant and smooth. We would definitely rent this apartment again, if we're going to Vienna again.