The stay was awesome. The flat is spacious, chic and in a great, central location.
A special mention ought to go to Claus. Claus was an absolutely exceptional host, very communicative and attentive. His apartment is superbly furnished and equipped with all sorts of amazing amenities (such as Sonos audio system) as well as simple things which travellers so often forget like toothpaste, blowdryer... even plasters and paracetamol! Very sweet little touches :)
All in all, we couldn't have asked for a better apartment and a nicer host. I have been using AirBnB for years and I can honestly say our stay at Claus's apartment was the best experience with the platform that I've had.