I saw the Les Miserables movie today. It was awesome. They did an awesome job of being faithful to the musical. That said, especially near the beginning, the singing and integration of the music wasn't awesome. (I've used the word awesome three times already in this post. I am going to try to use it less now.)
Like with Sweeney Todd, I think the most major roles in Les Miserables went to the actors who got them less because they're the best actors for the role, and more because they're the most famous actors who kind of fit. (Well, with Sweeney Todd, Johnny Depp didn't fit at all. And if you make allowances for that, did a great job.)
Hugh Jackman and Russell Crowe both had a rocky start in the roles. Jackman did a much better job as Valjean as soon as he was allowed to shave -- he plays 'kind soul with a dark past' better than 'haggard vagrant crushed by the injustice of the world'. Russell Crowe did not grow so well into the role. Still, he was only distractingly bad near the beginning -- I got used to it.
Thenardier and his wife were fantastic. (Sacha Baron Cohen must really like playing criminals in musicals. Or maybe he just really likes musicals, and nobody will cast him as anything else.)
Gavroche was brilliant, too.
I won't say any more, lest I spoil, except to point out that I cried, a lot. If your heart has turned to stone and you need a film to reach inside you and move something, go see Les Miserables.