I thought that the motivations, actions and reactions of the characters was realistic. I have not read the book so I can only go off of the movies. I thought it didn't follow a lot of the classic hero action tropes, even though I thought only a few things were a little two easy, but when the main character turns into a mouse, he seems like a totally different character, and it threw me off a bit. But it was surprising about the ending how even though they defeated the big bad they weren't able to become human again. And very end looked a bit too much like indoctrination of child soldiers, however the performances but the actors and actresses were very good and consistent.