Apartment is as advertised: two rooms + kitchen + bath + toilets. Location very good (although when I stayed there were some renovations which made annoying noise from about 7:30). Great WiFi. Very clean. Well equipped kitchen (didn't use/need it).
It would seem the entire building (or at least many apartments) are AirBnB. On the one hand it's nice to have a place to drop the luggage after you check out at 10 AM. On the other hand - it's less personal.
The bath has no curtain, which you may or may not care about. For me, it means way too much water on the floor.
In the post-stay communication, there is a bit too much pressure to give 5 stars, which I did not appreciate (e.g. "P.S.: If you give us 5* and you´re ever back in Vienna, we would love to host you again! ;-)" ).
Overall a good experience. Would recommend and would stay there again.