This apartment was a great catch! Its location is superb, only few minutes walking from Line 1 and Line 2 of the Metro stations (so basically within 15 min reach of any other part of Vienna); two stations away from the city center (Stephansplatz); few minutes away from great cafés and restaurants! The hosts were very helpful; rather minimum interference with your stay, save to ask whether you need house keeping (for free). I definitely recommend staying there!!