Sibylle's place was everything I needed, and more. Perfectly located with tram/tube near the souroudings, you can access City center within 10m. Shops (bakery, fast food, grocery store, chemist) are around the corner and if you're looking for something more historical/local the Jewish market is located just down the street. I enjoyed my jogging session in the Augarten park situated right in front of the apartment. I was able to discover Hilter's Flak towers (high anti-aircraft)
If you're looking for a long start at just a quick visit, this place will answer your every needs.
I highly recommend her apartment, I know I'll be back!