The Devil Wears Prada

This book's been sitting on my shelf for a while. I started reading it but just couldn't get into it partly because I assumed it would be funny and it wasn't.....
Short of something to read I picked it up again and finished it.
Is it me or was the narrator, Andrea, downright unlikeable? She falls into a job many would covet on the understanding that after a year's service her dream job will be hers. Fine.. I can understand that but does she throw her all into the job? No, she moans, groans and sneers at her colleagues who help her as much as they can because they're into fashion which she, clearly, isn't. How can you believe in a character who goes to work on a fashion mag. dressed in Gap and Banana Republic?
She goes to Paris on business and she receives news that her best friend's in a coma after driving drunk and no one can understand why she shouldn't get the next plane home or why her tyrannical boss who's paying her and actually needs her shouldn't release her with her blessing. Like this is supposed to be believable?
I wouldn't ever, ever employ Andrea. She's totally self centred, has her priorities mixed up and is unbelievably arrogant.
I'm looking forward to seeing how this appears in the film. I bet the producer just goes over the top on Miranda's character...