I did not meet Beata in person but the guy who checked us in was very kind to wait for us at the apartment, even though we arrived late in the evening.
The apartment had everything we needed and we were very happy to stay there. The neighbors were quiet and everything was clean and tidy.
It's is centrally located very close to Staatsober, Albertina and the pedestrian street. U bahn station is in short walking distance and the nearby restaurants are open till midnight.
Highly recommeded for a short stay in Vienna.