I've spent 2 days in the shared flat of Johannes and his roommates and I really enjoyed my stay. The room was very cosy, with a comfortable bed and windows facing a back-yard. Supermarkets and a lively street with a subway station right around the corner. Johannes was super easy going, making an effort to make me feel comfortable and helped out where ever needed! The flat is spacious and shared therefore you might encounter other people living there, which I personally really enjoyed. So If you're looking for a nice room, in a non-commercialised but more comfy and personal AirBnb in the centre of Vienna then I can definitely recommend Johannes' place!