Great location, doubt if it could be better; U Bahn at Neubaugasse having direct access to Wien Mitte, with MQ, Hofburg and other places of interest within walking distance, along with some lovely restaurants and bars, and Billa Plus and Spar nearby.
The flat was spacious, spotlessly clean, well equipped, and ideal for a short break, although it would be great for anyone planning a longer stay. Excellent shower and very comfortable bed; having lived in Germany we loved the fact this flat has jalousien, thereby making the bedroom nice and dark.
Sadly we didn't get to meet the owner, but in emailed conversations it is very clear he is an owner that prides himself on ensuring his flat at best meets, or exceeds , expectations. Well worth staying in, and were we to come to Vienna again, we would want to stay at this flat as was perfect for us!