Staying at Robin&Marc’s place was a great experience. They are both communicative, fun and very friendly. The flat is modern, stylish and very clean ( better than the pictures). Also it is quickly accessible everywhere in the city due to the U-Bahn station nearby. And the best thing is that you have two big supermarkets ( Spar ; Hofer) and a gas station near the building. In other words... Book it if you are in Vienna!