All in all, it was pretty good. Not groundbreaking, but a good effort at mimicking a Disney film.
The animation is excellent. Colorful, vibrant, I was very much reminded of Pixar's Coco.
None of the songs are earworms per se,
(except for maybe the Chang'e pop diva #), but they're decently crafted and mostly pleasant to listen to.
The story is not nearly as tight as your typical Disney film, and there are some cultural notes that are going to leave some western viewers a bit puzzled, but the overall message is very positive and heartfelt.
TLDR - Your kids will probably enjoy it.