Has anyone ever visited / experienced this? http://www.cantillon.be/br/3_14 I assume it would be overly busy and overly touristy than usual, but maybe not if you get there super early.
It's packed. But even on regular days it can be packed. Go early and score a table to drink some good stuff before you do the tour, and drink some more after! Bring some snacks if you're planning on staying/drinking a while!
Indeed. I would aim to be there for the first part of it (6:30am?), perhaps do the first tour at 7, and see how the day goes from there.