The apartment is lovely and huge. It's in a part of the city where you can easily walk or tram to all of the tourist sites, but you're far enough away from the sites to enjoy calm and relaxation.
The beds are comfortable, a bonus after a busy day of sightseeing.
Antonia is a very responsive host, always responsive. She gave us some great ideas for wonderful restaurants and cafes.
The apartment is a wonderful 'home base' for your trip to Vienna.