Hmm. Strictly one for the fans methinks. I'd sum up Coco Avant Chanel as beautiful but dull - like Marie Antoinette - breathtaking to look at, but the story is less compelling than the costumes.
The story moves rather slowly, with the scenes where Coco is inspired being clunky at best. The director stops short of having a lightbulb appear above Audrey Tautou's head when she sees fishermen in Breton shirts, but only just.
Having said that the love story is touching (but I'm a big softy), and Tautou is convincing as the melancholy but headstrong seamstress-turned-couturier. But I'd go for the clothes alone.