Matthäus' apartment is the ideal place to enjoy Vienna: the neighborhood provides everything you need, plenty of shops and bars nearby (and the almighty Ottakringer Brauerei is a mere 10mn walk if you want to enjoy some good beers in a relaxed setting!) and local transit to go around the city whether by tram (46) or u-bahn (U6).
Also, the terrace is surely a plus when staying over during summer!
The flat itself is as described: clean, cosy and fully equiped.
Although Matthäus wasn't able to welcome us in person as we arrived, his sister Anna was very helpful when showing us around the flat and also gave us plenty of directions to enjoy the neighborhood.
Communication was good all along the way and during our stay. Thanks a lot for having us, we had a great time in Vienna staying at your place!