Ben's apartament is near Vienna city center and the shopping discrict of Mariahilferstrasse. You can reach Stephansplatz by four bus stop or by underground in Mariahilferstrasse within few minuts. Apartment was really nice and quite clean, in a paceful neighborhood not far by Schonbrunn Castle.
Although Ben wasn't in Vienna during my stay, he fixed wi-fi problem in the house thanks to a friend of him, Morena. So, thank to you too, Morena!
If you want to visit Vienna, I recomand Ben's apartment!