Florian's flat is an extremely good deal. The apartment is in an excellent location, the rooms are clean, spacious, comfortable and and still below cost on a similar apartment.
Florian himself is very personable and informative. He was very quick to reply to our queries. The flat is within walking distance to the whole city (we never had a transit pass).
It was hard to believe we were in the city as it was very quiet. To top it all off the kitchen is large and spacious.
We would definitely recommend this to anyone looking for a quiet and sophisticated space "in the heart of Vienna".