We stayed at this Vienna apartment on the final nights of a trip and right as Christmas markets opened for the month. Check in was simple - a representative met us at the door with the keys and gave us a tour of the apartment. It is located perfectly within the Innerstadt district. We were able to walk to every market and attraction, and while we did not take public transit to surrounding districts they are easily accessible from here. The neighborhood is clean, safe, and quiet yet right near a major shopping and dining area.
The apartment itself matched the description exactly and was very comfortable for the three of us. Both couches pull out into beds with very comfortable bedding. There are many grocery stores in walking distance.
We had a wonderful stay and highly recommend the apartment!