As a huge ELF from 2011 onward, I felt compelled to watch this due to the overwhelming amount of characters being cast using Super Junior members. That being said, I watched this movie at the nice age of 15 years old. The plot line is catchy, even for its more juvenile audience, but it isn't necessarily something I'd find as much interest in, even now at almost the age of 20, in my coming years. It does its job. The acting I could say was mediocre. The lot of them are primarily K-Pop singers, after all, but they did surprise me in how well, overall, as a composite, the movie turned out to be. Hyun Bin level acting? Of course not, but if you're watching this movie, you're probably not expecting that to begin with. The music, although a bit biased as I do love the group musically, was good and fit well with the movie and its plot as the scenes progressed. Overall, the movie is great for light comedy and high school level jokes. A good watch for any K-Pop fans or those who indulge in genres relative to school and dance. :)