We spent 2 great weeks in Gary's appartment with our 3 kids during summer.
Gary has been very welcoming, helpfull and easy to reach before and during the whole stay. He helped us print some tickets.
Arrival was simple with keys available in an external locker.
The appartment is easy to live with very large bathroom and a well equiped kitchen (gas and large electric hoven, so real cooking is possible).
Vienna center is at walking distance from the apartment (very nice walk along Danau canal)
Public transports are close and easy to find, you can mix subway, tramway very easily. A weekly ticket is very affordable.
We had our car sleep in car Park brigitaplatz with a 2 weeks ticket (75€ for 2 weeks, buy directly on automatic ticket machine)
Augarten Park is at 5 minutes walk, very large public garden, perfect for runing, sleeping and nice family time : large kid playgrounds, open air swimming pool dedicated to children with theirs parents, with tobbogans). Do not miss the defense towers.
All shops, bakery and several restaurants in 5 minutes walk.
We highly recommand this place for couple or family.