The apartment is very central and within walking distance to many main hot spots such as Stepansplatz, Maria-Theresien Palace, National Library, the State Opera, Rathaus, many Christmas markets, etc. For those who enjoy culinary experience, these places are also within short walking distance: Cafe Central, Cafe Sacher, Plachutta restaurants, Cafe Landtmann, Demel, and many more.
Despite its central location, the apartment is relatively quiet and private. Elisabeth was very helpful and quick with responses. I definitely recommend her apartment for any types of stay in Vienna and personally would love to stay at this apartment again in the future when visiting Vienna.