I definitely recommend this place, it's totally worth it.
Illia is a very caring and helpful owner, he described the check-in in detail and we got to the apartment without any problems. The location is ideal right next to the train station, but at the same time the noise from outside does not come to the apartment.
The apartment is brand new, clean and comfortable, the kitchen has basic things like plates, mugs and cutlery or ice in the freezer, there is a luxurious shower, a comfortable bed and a great view of the city from the spacious balcony. That balcony! Also there is enough place to put things and a hanger for clothes, a table with chairs by the kitchen and 2 armchairs for sitting. The signal is a little weak, but the wifi works great. We hardly heard the trains from outside and the surrounding apartments were also quiet.
Perfect place to stay for a few days. I definitely recommend this place and if I'm ever in Vienna again, I'd love to stay here again!