In short
Wolfgang is very attentive and caring!
Location is fantastic. 5-8 minutes (walking) distance from public transport. Easy to get from the airport.
20-40 minutes (walking) away from main streets and city center.
House is fantastic. Good kitchen, great bed and bathroom, lots of windows and good curtains. Near some good restaurants as well. I honestly could stay in reading the whole time because it is so peaceful. Definitely will stay here if I come to Wien again.