It is an amazing place, I really loved it. Not too small, not too big, just perfect. Very modern, simple but with everything you could need. The bathroom is big and full of mirrors. The bed comfortable. The kitchen area has pretty much all you need when you travel. The balcony is lovely, it's big and it has a really nice view. The apartment was also very warm.
What I also loved about this place was the entire area, the buildings, the neighbourhood. It is so modern and nice looking, so clean and safe. There's even a small artificial lake right there. It was a joy to walk around there.
The closest metro station (Krieau) is only like a 3-minute walk. And from there, you're in the city's heart, Stephanplatz, in 10-15 minutes.
I traveled by car and because parking on the street is quite expensive and charged by hour, the host suggested me a park and ride garage 3 metro stations away where I eventually left my car for the rest of the trip. It's pretty safe and it costs 4.10€/day.