Just booked our return flight from Brussels for our beer tour this fall! Not sure yet where we'll fly into, maybe Paris? Take the train to Munich for a few days, then a few in Belgium. Can't wait!
Trains in Belgium are wonderful. If you're traveling into Bruxelles itself, be careful of the drug dealers. Probably less of a problem after the terror attacks, but still, it's business, so they'll find a way.
Don't forget to have a 'dingis' or waffle.
Try the Peach bier