Second time staying in one of Wolfgang's apartments (had stayed on the other one last time) and it was the perfect place for our long stay in Vienna! Location was great for us, in a quiet neighborhood and just a short tram ride to the center. Super market close by.
The heating worked perfectly - I usually get cold easily but had no such issue in this apartment.
Same with the hot water.
The kitchen was perfect too with lots of cookware.
All in all we had a great experience and would be back for sure.