Excelent apartment!
BIG, clean, BRIGHT, very comfortable, and decorated with good taste.
We were in winter so we didn't use the balconies, but I can imagine how nice should it be with warm weather. The Belvedere gardens can be seen from there!
Location is good, next to Belvedere and a short walking distance (20 min. aprox) through Renweggstrasse to Karlplatz or Scharzberg, where starts the Ring area (center, museums, shopping, great venues, etc.)
Finally, we want to thanks especially the hosts (Jan and Anna) who were all time so kind ;-)