We have successfully used Airbnb all over Europe, and we have never had an experience better than we had at Alexander and Bettina's place. The apartment was lovely, clean, spacious, and had everything we could have possibly wanted. Alexander and Bettina were wonderful hosts, allowing us to park our luggage in their adjoining apartment until ours was cleaned and ready(we arrived early in the morning before check-in time). The location was perfect for us, in a quiet residential neighborhood yet within a few blocks of all the major music venues, including the Staatsoper, the Musikverein, and the Konzerthaus. Thank you so much Alexander and Bettina for a vacation we will always treasure!