While a little out of the way from the main city centre (but close to Schönbrunn), it was very close to the U Bahn and for the price you really cannot do better. It's also just around the corner from a Hofer (Aldi). The flat itself was spacious and clean and was perfect for our needs. Check-in couldn't have been easier and Johannes was easily reachable via Airbnb, even though we had no problems.