I stayed in Herbert's apartment in mid-April 2018. The apartment itself is in a very good condition, everything is nice, clean and neat. I felt very much like home during my stay. The apartment has everything you might need, even a coffee machine which I totally loved:)
What I probably liked the most was the location. It takes a little less than 5 minutes to get to a metro station. Vienna's metro is very efficient, so wherever you need to go to it is fast and easy. I enjoyed the neighboorhood a lot too. The area is very beautiful and calm, the atmosphere is very relaxed. There is a long promenade along river embankment and you can take walks, run or ride a bike there.
Herbert is a wonderful host! Very friendly, always ready to help or give advice. He gave me some suggestions of places to go out to and explained everything about the apartment very clearly.
Definitely recommended.