Animation:
1) nothing too ugly but not too pretty to look at either
2) useless and ugly CGI at the end
Sound:
1) there were some moments where the dialog and the animation were not properly synced
2) some characters only sound good singing if auto-tuned
Story and characters:
1) the plot is simple and that works for this type of series but it got dragged out to the point that I wasn't entertained by the movie anymore
2) The inclusion of (SPOILER!!!) this King that is against anything that does not involve violence and everything else that happened afterwards was ridiculous. It doesn't matter if you agree or disagree with the guy but if he's the King, obviously their sons would have to obey so that entire sequence was ridiculous. And when the princes returned to perform, the King would know about them going against his orders because it's really hard to believe that the heirs to the throne would go home without an escort.
All things considered this movie is a 4/10 for me.
