We really enjoyed our stay in the apartment. Communication was excellent throughout and check in very straightforward. The apartment is on the second floor, there is a very small lift if you can't manage the stairs. As others have mentioned, it faces onto the main road so you do hear some traffic noise but completely to be expected as it's in the centre of the city. The apartment has lovely high ceilings, is well furnished and was spotlessly clean, the only thing we would have liked was a toaster, we grilled the bread instead! We stayed as a family.of 6, 2 kids, 2 parents and 2 grandparents, the layout of the apartment was perfect for us. It's a stone's throw from Rathaus U bahn station, the cafe underneath is great as well. Overall, a wonderful place to stay in the middle of Vienna.