A very poor effort and a worse result.

Rating: Null/10 (8 February 2014)

Clooney's record continues to get worse. His acting in this is horrible. The film is incoherent. It is pasted together of little vignettes that have no common thread. He tries to turn it into The Longest Day, but ends up with just a too long movie. With Cornelius Ryan, TLD was broken into true stories. With MM, we have one fantasy event after another that is forced to stand meekly on its own and falls flat on its face.
Clooney spends most of the time pontificating on how so important art is and that it is really more important than life. We hear this time and again. Other times this is some sort of road trip/buddy movie which wants to be taken lightly. George, it's one or the other. In the end, we get nothing but a very poorly done film This film was delayed in its opening and you will understand why. It is just very poorly done.
And heck, I know history and art. I've been to most of the settings of this film and seen much of the great art of Europe. Even that couldn't keep me from seeing this film as a complete ego-driven Clooney debacle.
Wait till it comes out on Netflix. Do not waste your money in the theater.