First and most importantly-David went above and beyond to make our check-in very late at night (as our flight was delayed) super simple and straight forward with clear instructions on how to get into the apartment. He was super responsive and helped us on every concern or question we had. David was also flexible in our checkout and allowed to leave the luggage in the place as our flight back was late, so we earned abother day in Vienna.
For the place itself - just perfect. Prime location, walking distance into attractions (museum quarter) and the house is literally surrounded by public transportation to every where.
Moreover the neighborhood is good and quiet with many resturants, cafe's and small bars. The bedroom is super quiet as others said and very comfortable place with everything you need. Just book it if you can.