Sanctuary Wood is a very different experience to many of the other museums and preserved battlefield sites. Don't expect high standards of visitor service, or cleanliness, or interpretation of exhibits, but be prepared to be moved by the feeling of close contact with the past.
The museum is privately run by the family on whose land the trenches were first dug. How original they are is up for discussion, but if you want an idea of what the trenches were really like, then this is closer than the places with concrete sandbags and the like.
It's not cheap (cost 45 Euro for 2 adults and four students) but you can spent quite a bit of time there if you look at everything. I've never dared eat or drink there, but the facility is available.
Most of the items on show appear to have been collected straight off the battlefield, or were even created there in the case of the many examples of "war art". Of great interest are the 3-D viewers with battlefield images - these are often very gruesome, and pull no punches whatsoever; they are the unvarnished truth of the Great War, and are fascinating for that reason.
Sanctuary Wood will always be controversial, but I think it is worth visiting if you have an idea what to expect.More