Awesome location located close to the Vienna Opera House and Karlsplatz which are major stops for tour buses and metro. Osman is responsive and a great host. The apartment was clean and cozy. We very much appreciated the great drinks he left us the first day. The in-room washer was also great and convenient. We arrived during a heat wave so it was quite warm being several floors up. Just a note that like most accommodations in Vienna, there was not any AC.