Having visited many Military Museums around the world I was amazed and impressed by this one and spent a thouroughly enjoyable, rewarding few hours there. Only a business commitment - the real reason I was in Brussels at all - dragged me away. The museum opens with a collection of Waterloo items which include many rare items, including some of the best Carabinier relics to be found anywhere, including Les Invalides, and continues through cases containing a wealth of items celebrating Belgium's varied military history: a reminder of just how many times the land has been fought over! It closes for lunch at 11.45 which is the time to head to the aircraft hall and if you have any interest in aeroplanes you will be wide eyed with delight. My only disappointment was that the balconies which contain an amazing collection of WW1 aeroplanes is presently closed to the public. I have no idea if there are any plans for it to re-open in the near future, but I would go again just for that.
Don't miss the fabulous collection of Napoleonic uniforms and accoutrements in the tower which many do, apparently. It is a delight although it was a shame that the attendant could not tell me whose was the Marshall's Baton on display with no labels.
This is a brilliant museum. It isn't a modern, interactive, game playing, try it on museum so youngsters may find it a bit much but minor niggles aside, there is so much to see that it demands attention.
And it's free!
Spend a day there, and tomorrow go to the Battlefield at Waterloo. Both are amazing in their own, unique ways. I will be back.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC