The apartment was super nice; we're really happy that we found it and would look for first on our next visit to Vienna. It is so comfortable and so well furnished with everything we could want. The decor is outstanding. Anyone who loves books and plants will find this place to be a dream. The outside deck was marvelous. We spent many hours out there enjoying meals and reading. The loft sleeping arrangement worked out well for us but it does require climbing a few stairs.
There are lots of sights within walking distance of Christine's apartment. The museums and palaces were about a pleasant 20 minute walk from the apartment. We walked to the Belvedere as well.
Vienna is a lovely city and Christine's hospitality and help made it all the more so.
P.S. She recommended Schreiners as a good traditional Viennese restaurant. We dined there and had a wonderful time.