The Airport Bus stops at 150 meters from the apartment (Morzin Platz), a return ticket is 13 euro per person. That's a steal! The apartment was exactly as described at a very good yet a bit noisy location. Markus and his partner made us feel very welcome and the useful "tourist" map came in very handy. From the apartment you can walk through the entire old center (Innere Stadt district) and for the more further away sights like Schönbrunn you have lots of perfect public transportation options like the very close-by U-Bahn (Schottenring station). We really took advantage of the Vienna Pass for six days with two 72-hours travel cards. We had an amazing holiday!