I stayed here in summer for 6 nights with 2 kids. It was a wonderful experience, the apartment just right next to the river. There were all fun activities occurred everyday in the river. Boat rental is easy.
The apartment is well arranged and equipped with all the necessities we need for our stay. There are enough space for the kids to feel like home. Walking distance to VIC, UN building. Several supermarket nearby. MacDonald is just a block away and food court within walking distance. We will stay here again for sure if we have the chance to come back to Vienna.