I stayed in the apartment for one month, and I really recommend this as a great place to stay. The public transport is excellent and it is within walking distance to several modes of transport. In particular, the train station is about a 4 min walk, while the tram is just around the corner, and the underground is about 10 min walk. It takes about 25 min to be in the centre of Vienna and this is very easy. As well, Schrobrunn Palace is 15min walk away.
There are two main grocery shops about 5 min walk away for food, and restaurants, bakeries, nearby, (and many more easily accessible by hopping on the train or tram for a few minutes!) .
The apartment is very nicely and appropriately furnished with a comfy bed and pillows with quiet neighbours. It is a quiet neighbourhood with exception of hearing the trains occasionally go past and the church clock across the way chiming the hour, but I did not find this to be a problem for noise since this doesn't occur during the night.
Sonja is extremely helpful and very nice, and it was a pleasure to stay.