The place has all the modern amenities and is extremely comfortable. The building is a bit quaint and is undergoing renovation (with no disruption), but the apartment itself is quite well-equipped and calm. It is located in an excellent central Viennese district, with plenty of shops and transport connections. I never got to meet Christiana, but she was extremely responsive and was quite flexible with my requests. She has made thoughtful additions to the place (like coffee and precise check-in instructions) which made the stay even more comfortable. Overall, I would highly recommend this place.