Suzana's place is perfectly located. We bought long termed train and tram tickets but used them only 3 times. We walked to most sights and found so many hidden gems (it's about a 25 minute walk to the center). We only took public transportation to the sights further out. By the way, if you have kids make sure you check out the Prater theme park about a 12 minute walk away.
Her home was sparkling clean and her thoughtful touches made us feel welcome. She had fresh fruit and cookies waiting for us and made a delicious Austrian sweet treat the night before we left. She also promptly responded to all of our questions. If I had to say something negative, it would be that the shower is small but you can make it work.
We will definitely be staying again when we visit