Really nice appartment and very well comunicated: subway stop just next to the place), Prater at 10 minute walk, CityBike stop next to the building (which is the best way of moving around Vienna)...
If you have a car and you come on weekend there are many places where you can park it for free in the surroundings.
The house was a bit hot (having a couple of extra fans in the place would be great and useful), so we had to open the windows and let them that way the whole night . The problem with this was that the flat is next to a very noisy avenue. We had to use ear plugs to be able so sleep that way.