Florian's apartment is located in a working class/immigrant neighborhood, mostly 3/4-story buildings from c1900, no particular charm but not unpleasant. The apartment itself is very nice, brightly painted and pleasant, and we enjoyed the quiet balcony overlooking a green courtyard. It was fully equipped and we lacked nothing. More than that, it feels like someone's real living place, which is becoming harder to find on AirBnb.
The apartment might seem far from the center, but it is a nice base to explore Vienna and the surroundings. Transportation is easy, especially as multiple-day passes for public transport are very cheap, and there are buses, trams, and subways close by. There are stores and shops within a 10 mn walk. Schönbrunn castle and park (including a nice swimming pool) is a 25mn walk, the city center is a few stops on the subway; Mariahilfer, Naschmarkt and other restaurant/shopping areas are not far.
Our family of four spent a week there and we strongly recommend it.