This is one of those films that doesn't really have any real 'good guys', or anyone to really root for. They are all very flawed characters - with only rare moments of likability. But strangely enough, I really didn't mind this, as the characters are still extremely watchable, and you NEED to know what happens to them, whether it's good or bad. It's so well-written - I ended up putting subtitles on to catch every word.
However, this is a satire - it's not a comedy. It's very clever and witty, but it's also dark and dry. This isn't a criticism - it was great - but it's not for belly-laughing. You need to settle down to watch it - you're not going to be particularly uplifted.
But Reese Witherspoon is fantastic, and it's one of the best high school films there is. It's definately worth watching.