I stayed at Sophias flat as a business traveller which makes my situation a little different from staying as a tourist, but from the flat's location, you have a fair travel time to Vienna city center. You can go from the airport to Vösendorf Siebenhirten local station by train and tram. Taxi from the airport to the flat cost 55 Euro. I chose the flat for two reasons: washing machine and parking for my car. Betides this, you have all you need in this flat. Kitchen, shower / bath tube and separate toilet. Plenty of room for 4 adult.