The flat is small, but comfortable, perfect for one person. Super clean, located in a central area, close to the tram and 10 (or less) minute walk from the closest underground station. In 30 minute walk you are in Schonbrunn. There is a Spar right behind the flat. Thao and her husband are very friendly and helpful, I've never had such a nice experience with landlords as I had with them.
I definitely recommend this flat, for a short or even a long stay.