Entertaining. Meryl Streep is great as Miranda Priestley, the feared editor-in-chief of a fashion magazine. We've all seen this type of boss portrayed in movies and on TV, everyone scurrying to meet impossible demands, but this one does it without the screaming temper tantrums. In fact, her voice stays low and reasonable-sounding throughout, and it's fun.
Anne Hathaway, as the new number two assistant to Miranda, Andrea somebody, sometimes looks great and sometimes looks like a Disney Princess (maybe Snow White), which doesn't mean she looks bad, necessarily, just a little like a cartoon. You know, skin like snow, eyes like coal, lips like blood, or whatever it is. And I was sometimes confused about who (old boyfriend or new famous writer boyfriend?) or what (stay in fashion job and dress amazingly or return to old dream of writing for The New Yorker?) I was supposed to be rooting for. I don't know if this was a weakness of the movie or a strength--maybe it's good not to show choices as Good or Bad, since they often aren't Good or Bad. I suspect that it was actually a weakness, though, perhaps caused by too little time given to Andrea's old friends, boyfriend, ambitions. Or maybe they were given enough time, but they just seemed boring compared to the cut-throat world of fashion where size 6 is the new 14.
Some secondary characters were very good: Miranda's number one assistant, a bratty English girl who reluctantly helps Andrea along, and Miranda's right-hand man who is kind to Andrea but doesn't pander to her whininess.
Also, I liked the music a lot.