We spent 2 days in the apartment visiting Vienna for the first time and it was a great experience.
Lovely place situated near the park, just 15 min walk to Zoo. Bus stop is just few steps - you can leave your car and go wherever you need.
The apartment is very nice and absolutely clean, big terrace and trees around the windows make it really charming.
NB for those who need absolute quiet for a good sleep: one of the the streets nearby produce annoying traffic noise..
Summarising, our stay was a great balance of the price and quality - I definitely recommend this property for families.