This is the very beginning of the movie:
It's one of the most charming feature-length cartoons of recent years--funny, sassy, startling, original and with six songs by Elvis. It doesn't get sickeningly sweet at the end, it has as much stuff in it for grown-ups as for kids, and it has a bright offbeat look to it.
The New York Times:
The mood is cozy and familial, and the relationships have authentic tartness as well as generic warmth.
the true joy of the movie is its richly drawn characters, which help ground the wildly fantastical tale in reality and which will appeal as much to parents as to the children...