My girlfriend and I stayed in Christiana's appartment for five nights. The appartment is exactly like advertised, very clean and spacious. We encountered one minor issue that Christiana immediately replied to, she proved to be a great host. The appartement is located in a very nice neighboorhoud. It's close to the center of the city (we mostly walked) but also has public transport options nearby. All in all we had a great stay and really enjoyed exploring Vienna. I would definitely recommend Christiana's appartment.