This movie contains some of the worst animatronics I have seen in 15 years. If you can get past that, it's a slightly entertaining "family" movie. Of course, anything with Lee Sung Min in it is bound to have some redeeming features, and this is him doing his hammy overacting shtick, which is pretty funny. Bae Jung Nam was a nice surprise and handled a ridiculous part with - well, you can't call anything that silly "with aplomb" but he was quite excellent. I'm pretty sure David McInnis is actually a terrible actor, either that or he's always directed badly. He wasn't any fun to watch. Sinvely Whiplash would have been more nuanced.
The music was irritatingly loud. I often had to turn down the volume and then crank it back up when there was talking.
If you are not expecting much, this is a nice movie you can watch with kids who speak Korean or who can read subtitles fast. There's some comic violence.