This is a decent movie, and if you're packing heavy loads of estrogen in your brain, then this movie will make you feel really good. BUT, this movie isn't realistic at all. For Juno to have been able to make all those witty references to pop-culture constantly, she would have had to watch TV 24/7 for the first decade of her life.
The music ground on my nerves as if my ears were rotten teeth and the music was the dentist's drill, sans anesthesia. It was just so incredibly saccharine and pitiful.