Thomas’s friend were waiting for us on the arriving day. He is super nice and told us all the information about public transportation, tickets etc.,
It took us around 30min to reach the apartment from the airport by S 7 train and metro. The apartment is just 200m from the metro station. it takes about 15min to reach the center directly from the nearby metro station.
However, part of the U4 metro line which is going to Schönbrunn Palace is on the construction now. Instead, there is a U4 bus from Karlsplatz station to Schönburnn Palace direction. So it will take a bit longer time to reach from the apartment.
Besides, it’s convenient to take directly train to Bratislava as well. The train will pass the nearby station( Stadlau Bahn) which is about 5 min by metro from the apartment. So we didn’t need to go to Vienna main station to take the train.
The apartment has everything we need. :D