Milena's place was absolutely amazing!
It is furnished in a very modern style, every squared meter is used.
Milena was very answered any inquiry very fast, and was always available.
The place is located in a quiet place, and still very close to the center, and to the train station that will get you anywhere in the city. It is also a short ride from the apartment to the airport (via either the Vienna public transportation, or the CAT).
I highly recommend the apartment, and will book here again in my next trip to Vienna.