It is a modern and stylish place, we enjoyed it for a week by the family of 4 people. We travelled by car, and parked it at Parkhaus Park&Ride Donaustadtbrücke as host suggested, so we paid just €25.2 for a week. There is U2 station just across the road (1 min by foot) and U1 station in ~10 minutes. We found Prater district a very joyful — it's always alive and not too noisy, we liked the lights of amusement park when walk in evening, liked our visit to Viena University campus (very modern buildings and interiors), also Hundertwasser House and Kunst Haus are reachable by foot.
The apartment itself is very comfortable, has pleasant details. Kids liked toys and board games. We loved Waffle machine for Viena Waffles.
So yes, it's a highly recommended place to stay.