We stayed four adults for four nights in this beautiful (and huge!) apartment and had an absolutely great stay. 100 % clean and nice, new furniture. Very centrally located with U-Bahn just around the corner and most attractions within walking distance. In the ground floor of the building there's a cosy café, which serves local, Austrian meals. You can hear some street traffic inside the apartment, but we didn't really mind. Christoph was very friendly and helpful and gave tips to the city. He was also flexible in terms of check in and check out - we really appreciated that. We can definitely recommend Christoph's place.