I rented the flat for a start when I was moving to Vienna, and already before I arrived, Wolfgang showed what good host he is by offering to get me some food for the fridge due to the quarantine rules in Austria for incoming passengers. They were always fast to reply whenever I had questions.
For the accommodation itself, it was very nice. Everything you need is there. Also, the location of the flat is perfect if you want to be close to the city centre, but also close to greener areas (Augarten, Prater, and the Stadtpark are within walking distance). In short, the flat had everything I needed, and I would not only highly recommend other people to live here, but I would also book it again if I ever need a nice flat in Vienna.