We had a great time at The Garten-Studio. The appartment has everything you need for a pleasant short stay in Vienna. It was clean and nicely decorated. The area is quiet, but the Museum Quarter and other Viennese hotspots are within walking distance. And if you don't wanna walk, the metro is just around the corner.
Susanna really is a superhost. The communication was just perfect and she gave us some great ideas about where to go and where to eat (Café Eiles!). So highly recommended!