The flat is lovely, exactly as described in the listing and in the pictures. I especially liked the master bathroom (the bath and rain shower) and the living room. The location is also really good, as it is very easy to get into the centre of Vienna very quickly.
I had contact only with Ferdinand via email, and everything was sorted out very quickly, with minimum of hassle and fuss, and the guest handbook was very informative. There was a slight hiccough on arrival, but this was sorted out very smoothly and efficiently. Despite this tiny hiccough, I would highly recommend this listing to anyone and if I am ever in Vienna again, I will be staying here.