The apartment looks just like in the pictures and its perfectly located.
There is a direct subway from the airport (2.20Euro/ 25 min) that leads you to the Wien Mitte station, and from there its a 3 min walk to get to the apartment...and 15-20 min to get to the old town to St. Stephen's Cathedral.

Alexa was super super nice. She even waited for us at the subway station and brought us a baby stroller for our 3 old kid which was very useful.

Thank you Alexa for hosting us!