The apartment is completely as you can see in the pictures. Very light during day, spacious, well decorated, clean, all you could need is there and even more. There is even a portable WIFI device which you can take with you on your trip through the city. It's only a few minutes to the U-bahn station Karlsplatz from where you can get everywhere by metro. And if you're more into walking (as I am), it's well located also, only approx 10 minutes walking to the Wiener Staatsoper.
I met Eva when I arrived and she is very nice and helpful. As for me it was already the 14th time in Vienna, I didn't need much extra info, but I'm sure you can ask her or Michi if needed.
The next times that I will be in Vienna, I would certainly like to return to this apartment (or one of their other apartments).