Wolf's appartement is great, with a perfect location close to Stephansdom and most central subway station.
Wolf and his wife are very sympathic and welcomed us very nicely, to answer all our question and advice us about Vienna.
I will recommand this appartement to everyone that is looking for an appartement in Vienna !
The only negative point would be that their was no shutters on the windows and so, we were wake up very early by the light day.
I have inform Wolf about this and think that we will add blackout curtains on windows.