If you are in Vienna, stay at Eva's place. Highly recommended. Vienna was our third Europe city to visit in 10 days and we used airbnb for the entire trip. (London, Florence, Vienna). Eva's apartment takes the #1 spot for us as it was spacious, close to cultural sites and district 1, very easy to check in/out, and superb communication that left no doubt in our minds about any aspect of our stay.
Eva sent us a list of things we could to in Vienna and provided additional information about transportation. We used one of the taxi companies she recommended to handle our airport trips.
Apartment had a 60 inch tv with fast internet connection that came in very handy.
Overall, my wife and I enjoyed our trip to Vienna and are Eva's apartment was available.