I booked this apartment for my parents who came to visit me in Vienna for a weekend. They enjoyed their time here and also liked the apartment! I can also comment on how quick and efficient, as well as friendly Markus was in answering questions in this time of uncertainty, related to the pandemic.
Overall, we would recommend Markus & Vera as hosts, for anybody who wants to see Vienna, stay in lovely Margareten and live comfortably in a nice AirBnb! :)