We were met at the apartment by the hosts mother who was a charming lady who warmly welcomed us.
The apartment is faultless, well furnished in a contemporary Ikea style. Very warm on a cold winters day and very quiet without any external noise. The apartment is right on the Ringstrasse and perfectly placed to enjoy central Vienna. Only 5 minutes walk from Karlsplatz underground station which in turn is easily reached from the airport.

My wife and I would certainly stay in this apartment again.