Society is forever presenting women with false choices. You can be a good mother, or you can have a rewarding career. You can be self-sufficient, or you can have a happy marriage. You can be a prim virgin, or you can be a self-loathing slut. But never both and never anything in between. The choice is either A or B.
The Devil Wears Prada cheerfully sets up its own false dichotomy: A woman can be ambitious, or she can be a good person. And this, too, is misogynistic crap. It doesn't matter that a woman wrote the smug, self-righteous novel on which the movie is based. Underneath the pretty clothes and tidy conclusions, The Devil Wears Prada is simplistic and insulting.