The apartment has a really convenient location—it's situated a minute away from the central trainstation and U1 metro line. Also, if you don't mind walking, you can get to the old town in around 30 minutes. Bonus points for the view as well!
However, it could be better equipped with kitchenware. And tbh it's quite small and it doesn't have a proper dining table. Also, we had a hard time regulating the temperature in the room.
Would recommend it for a brief trip to Vienna (and not for longer stays).