We bookended our vacation to Austria in Vienna and we stayed at Christoph's place both times. His place is located in a very quiet neighborhood with lots of restaurants. U-bahn station is 5 minutes away by walking and all touristy destinations are only few stops away. Christoph's daughter Carina helped us check in and she was always available if we had any questions. Also, the place is very clean, roomy and very comfortable. We had a great stay and we highly recommend Christoph's place. Thank you!