Dan was very nice, he respond to all our inquiries very fast.
The apartment was exactly what we expected - big, clean, very well equipped. Suitable for a family (we were 3 grownups and 2 toddlers).
Dan also provide us toddler seat and bed which was really nice.
It is very center located - 3 min to the tram and metro stations and 10 min walking to the center - we almost did everything by just walk.
like Dan said - if you are a runner (as i am) you just need to get down and run on the water front. There is a cool indoor water park next to the apartment which the boys really liked.
getting to and from the airport is very easy too.
We will certainty recommend the place and will stay there next time in Vienna.