This apartment proved to be a very nice place to say. It is comfortable, well appointed (with a good stove, dishwasher, toaster, a small balcony, nice shower and bathtub, washer and dryer, and excellent wi-fi), and is totally "livable." The location is excellent: nice neighborhood, close to both streetcar and subway, with a supermarket and shops close by--and less than a block away the classic Wieden Bräu, a Viennese Gasthaus of the best sort.
Chris was an excellent host, too. He made sure I could check in easily on my travel schedule. When an unexpected problem, which was beyond anyone's control, came up he made sure it was resolved easily and with very difficulty. I recommend this place for anyone who wants to stay in Vienna comfortably and affordably.