I finally saw the movie today and, as a lover of the musical, I truly found it a completely frustrating experience.
I cannot fathom why Hollywood is hell bent on making musicals again, only to completely destroy them by casting people who CANNOT sing the roles.

I proffer Renee Zellweger in "Chicago," John Travolta in "Hairspray," Gerard Butler in "Phantom,"
Johnny Depp and Helena Bonham Carter in "Sweeney Todd" 
(a complete desecration of one of the greatest musical/opera scores ever), Daniel Day Lewis in "Nine," and now both Hugh Jackman and Russell Crowe in "Les Miz."
I get that producers feel they need a "name" or "names" to market, but at least in the case of "Hairspray" where Travolta was so horridly miscast, at least he wasn't the flipping LEADING role. All I can say is that "Les Miz" gives me complete and utter dread of an "all star" movie version of "Wicked."
