I spend a really nice weekend with my (senior) father in Vienna, staying in this apartment. It is a very good base for exploring the city. The apartment itself is not particularly interesting to spend a lot of time in, but I must say I really like the furniture in it.
The apartment is at the back of a large building with several apartments (not all inhabited, it seems), which was being renovated at the moment we were there. That didn't really bother us, only disadvantage was that the elevator wasn't operating (apartment is on the third floor), but the owner assured us, this will be fixed as soon as possible.
The apartment is easy to reach with public transportation (of which the possibilities in Vienna are endless) and located on a charming square. At night it was really quite, nice for sleeping.