It was very good choice to stay at Christoph’s apt. It is super spacious, with breathtakingly hight ceilings, very nicely decorated and one can find there everything he needs. We spent awesome three nights in Vienna and the apt is super close to all the attractions. There are also nice cafes and bars right nearby. We didn’t meet Christoph, but he was very helpful with his quick responses and all the advice. Definitely recommend!