The apartment is in a quiet location and is very safe. Andi met us out the front of the building when we arrived. It is a spacious apartment for two people. It is located on a street off the Mariahilferstrasse (shopping street), with a metro station at the end of the street. There are a few restaurants, cafes and a supermarket on the same street. It was really easy to get around Vienna from the apartment.
We had a great time at Andi's place and would recommend staying here when in Vienna!