Dominik was very accommodating to our arrival timing even though our train was delayed - he met us at the door to help us with our luggage as well. It was on the 4th floor (if you count the ground floor as 1). The apartment was shared with other guests who were friendly and quiet, and the place was very clean and pleasant-smelling! There was a washing machine available, and shower amenities were all provided. Bed was extremely comfortable too. We thought him providing slippers was a nice gesture as well (: The overall experience was so good we regretted not giving Vienna a bit more time!