Alexander is a great host - very quick on replying to any questions or queries. The apartment was super clean, very comfortable, and is in a great location, close to the U-bahn (Karlsplatz), trams, and the Inner Stadt is 10mins walk. There are lots of good restaurants close by (Riva for pizza, Gasthaus Ubl for local cuisine, Nagoya for sushi etc) and the Naschmarkt is a couple of blocks away, which is great for food and the Saturday fleamarket. A great place to stay!