I stayed 1 month at Arabelle's apartment.
Arabelle has been super reactive.
-The apartment has an EXCELLENT location. I walked almost everywhere. And I felt safe walking home even at night.
-The apartment is comfortable, and the heating is good.
-I worked from there remotely, and the wifi was good to do so. (Thanks Arabelle!)
I would definitely recommend this apartment for a stay in Vienna and would not hesitate to go back :)