I hate to burst anyone's bubble, and don't worry I won't put in any spoilers.
This movie was a pretty big disappointment for me. Sure the action was great, but whenever they tried to be funny with the dialogue, I'm sorry it just didn't work. That seen with Schwarzenegger and Willis fell flat on it's face. There was no chemistry amongst the cast, and it was a crappy screenplay. Other than that, this movie rocked. See it if you like, but this is your warning. It was mercifully short though.