Katerina department is excellent. It has everything you need, both for a business trip or sightseeing. The apartment is fully equipped and very modern. It has a wonderful espresso machine, plus many other things !! But I love the coffee, so it has a special assessment for me. The location is also very good, you can access within minutes both lines U4 (Spittelau) or U6 (Jaegerstrasse) of the Subway from Vienna. From the airport you can be reached by train (S7) directly to the subway station Spittelau.
The building has a modern elevator and is very safe. There is a Penny Grocery store a couple of blocks and some restaurants nearby. Kati is also very friendly, a great hostess. I recommend her apartment and I would stay there again when I return to Vienna.