Highly recommended AirBNB for Vienna.
It is extremely well located in the city, and it is also on a very swift route to and from the airport.
I can genuinely say I have not stayed at AirBNB such as this one, but this is what made it so enjoyable and interesting.
I especially liked how the host was extremely attentive to our late in the evening arrival time, and ensured we were greeted at check in.