A nice and cosy flat within reasonable distance from the city centre. It takes a short tram ride to get to all the attractions, but that is hardly a problem once you figure out how to use public transport. The flat is clean and has a kitchen and essential kitchenware in it, which you certainly may need (restaurants are not cheap in Vienna). It is important, though, to note that the bathroom is considerably small and large people may have bad experience using it.
As a whole, I was happy with my stay in this flat and can only recommend it, unless you are bothered with the size of the bathroom.