The apartment was just what me and my girlfriend wanted, it was clean, it had a great kitchen with utilities and close to the center of the city. It was easy to find, when we came from the airport, we took the train, and it was basically a straight line from the train-station to the apartment. The location was great, it was close to the city center, and just far enough away that the apartment was sheltered from noise and traffic. We had no problem walking to where we wanted to go.
All in all, I recommend this apartment!
If you are visiting Vienna, this apartment is close to a great restaurant that i recommend if you like fine dining with a reasonable price, go to "Le Ciel"!