Totally insane and obviously a must-watch for SuJu fans. I actually first watched this before I even knew who Super Junior were so imagine my confusion at the random dance number during the credits XD But even then it was thoroughly enjoyable, a film without a care in the world! I rewatched after becoming a fan of SuJu and got more of the jokes etc. but enjoyed all the same. *thumbs up*
Advice: don't question the story... just enjoy. XD haha