We had a nice stay in Vienna, the flat is correct and corresponds to the pictures. It is a little bit small for 4 persons and we had some problems with the shower which was quickly clogged.
Except that, the flat was good, with the necessary tools for a short stay and a washing machine.
I recommend it for the price and the location which is perfect (next to Prater parc and at 10min of the center in metro). Furthemore, Nelcy is super reactive and available, the arrival and departure where fluent thanks to that.