I think it was another one of those movies where I marvel at the skill of the animators the whole time. The way the characters and look and animate is far from realistic, but they're so good at evoking exactly how, for example, excited little kids act when they want to play.
My main complaint about the movie was the main character, i.e. the sister of the heir to the throne. She was based on that "oh gosh I'm just so awkward and quirky" personality way too heavily, in a way that felt like the people who wrote the character were pandering to my high-school self.