Bizarrely, I can't quite put my finger on why it's so mediocre. The ideia, the intention is great, and Clooney really tried hard but the tone... just feels wrong. Too lighthearted to be a war drama, too goofy to take seriously, but it TRIES to be serious. The child shooter scene, the soldiers in the bush, and especially the mine scenes are so silly. The plot structure is messy. Good (but wasted) cast and premise.
Maybe 2 1/2 out of 5 stars. If Frankenheimer's The Train had an emotional son prone to crying & excessive sentimentality, Monuments Men would be that son. Throw in a dash of Ocean's Eleven and a decent cast and its salvageable. Mostly it just bums me out how Clooney's directorial career started off with Confessions of a Dangerous Mind and has gradually been going to hell.