Clean and nice apartment. It has small kitchen/dining area and 2 bedrooms; one quite large and another is smaller. No living room but it didn't matter to us as we only were spending nights there.
Close to the center of Vienna and if you are keen you can walk there (40min) or ride a bike (city bikes are available for rent in a lot of locations in Vienna).

The host was very helpful, gave us a map, answered all our questions, and recommended places to eat.