We stayed as a family of four at the apartment at the end of January 2020 - and were all very happy with it! The appartment is really large, newly set up with everything you need. The location is really good, because it is a mix of being quite close to the inner city via metro (just a few stops an line 4 and the metro station 'Schönbrunn' is just a few minutes away) and being in a traditional area of Vienna (Rudolfsheim-Fünfhaus) which previously had a somewhat shady reputation, but now is really just getting more diverse. You find lots of pizza locations etc. nearby and some cool old/new restaurants etc.
We liked (and used) the Netflix service, also regular cable tv stations would be a plus.
What is special about the apartment is its layout - seems to be a kind of previous shop. The large windows in the living room just face the boardwalk, like shopping windows - but are blinded in a clever way, so you feel safe from views but still take part in the streetlife. Anything else (heating, shower etc.) was perfect, clean and modern.
So, highly recommmended!