Nice apartment. Very well equipped. 10mn walk from the Paterstern U/S-bahn, hence quite a practical location not too far from the centre of Vienna.
Logistic was excellent, and friendly and efficient communication, questions always promptly and nicely answered (really appreciated). We also got some tips on an event in Vienna while we were there. That felt good even if we didn't use the tip at the end.
We (couple, 1 kid, 1 extra friend) thus felt quite comfortable for this short 4 days stay. Some coffee, tea, sugar were available (a nice addition when you arrive) and again apartment overall well equipped (including e.g. fans in each room, which was quite welcome considering the heat peak in Vienna).
Only negative thing which may be problematic for some visitors: there is a door opening between one of the bedrooms and the living-room (entry floor) but no physical door (probably to gain some space). Something we would suggest to fix (put back the door or something equivalent to isolate from the noise/light) as it is a problem if you wish to use that bedroom in the evening for e.g., kids going to bed early and have a lively evening in the living-room.