I tend to grade animated films on a curve, and I'm agreeing with the masses that this is an animated masterpiece.
The third act of this movie is one giant action-extravaganza spectacle that's like Dragonball Z combined with Harry Potter, with a pinch of Marvel/DC, all under an ancient Chinese folklore skin, with Pixar-level animation. It's fuckin' rad.
Be sure to watch the original Mandarin audio version; the subtitles are worth it. The voice acting is a lot less hokey…