The apartment is a nice space with generous bedrooms and a very well-provisioned kitchen. It is like a little city eyrie in an older building, with a great rooftop terrace (summer would be brilliant). The location is in a gentrifying area, and about 25 mins walk to the centre of town. Close to Hundertwasser Haus if you like architecture. Walking along the river to town is great if you like street art- a lot of very good pieces to see. We were there in winter so nothing but joggers; in summer it would be great.
Nushin and Horst gave a lot of information on places to eat locally, which was very helpful. There are three small supermarkets close by and train/ underground stations within 10 mins walk.
In all, very acceptable for a family holiday with children.