I felt very comfortable in this apartment. Its very spacious and cozy. Jonny has been a wonderful host, waiting for me in the apartment as I needed an early check-in due to my flight schedule. There was complementary coffee/tea and goods such as (oil, sugar, pepper etc.), which I consider a nice gesture as you don't have to buy those later. The apartment location is very good and walking distance to the central area. However, public transport is not an issue in Vienna, you can get wherever you need to.
I would definitely recommend this apartment to anybody who visits Vienna!