The apartment is in a superb location, there are supermarkets and restaurants in the immediate area. The u-bahn station is minutes away and you can be in most of central Vienna in a really short period of time. The Naschmarkt is also a short distance away, my sister is a big flea market fan so she loved this. But the Naschmarkt is also great for restaurants.
The Marienhilfestrasse is only about 20 minutes walk for all your high street shopping.
The apartment itself is lovely, with all the amenities needed for a trip and a few added extras such as a usable computer.
All in all I can really recommend this place, its a great place to get to know the real Vienna.