True, the Usual Suspects had its flaws, but the meat of this movie is as good as any thriller. Great characters, great story(not the suspense/mystery itself, but the actual story), and great performances.
The thing I don't get is when people say that they don't like it because of the mystery itself and say it was horrible. Even without the mystery, or if we never solve it, I think it's a great film. That was just the bonus to me.