I have lived animation since watching my first cartoon. This film was completely different and fresh with the scrapbook style and I loved it. I have not seen the 3rd installment but unfortunately, I did watch the second which is a disaster. Sad, because as the sequel to this great animated family movie, there were many directions it could have gone to give us an expanded universe.
Speaking specifically about this 1: everything was well done, thought out. There's nothing lacking in the plot, no dull moments or bad scenes. Well done.