Not yet, I'm waiting for an answer about the tickets. A colleague of mine who's also going, will contact them as well, I'm curious.

Yes sure I know Düsseldorf! Been there too But I did the same as you: I put Brussels because everyone knows it, but in fact I live in a town JUST outside Brussels... But it's only ten minutes by car from Brussels and I've always been to school there, work there, even lived there for about 10 years, so that's "my" city, I love it there