We stayed in the apartment last week and it was amazing! The location is great (15 mins walk from the centre), the apartment is in a quite neighbourhood facing the inner yard (which is nice for a relaxing night sleep). There was everything we needed in the apartment.
Although Gan-Ya was away and we couldn't meet her personally, she supported us before and during our stay at her place and gave us a lot of cool recommendations on what to do in Vienna.
Highly recommended!