This is not just an actual Pixar-styled feel-good movie (it's actually a bit sad, really).
Not to mention that there were many awesome jokes and gimmicks in the movie. The storyline was good, the mood was great, and character designs were awesome.
There weren't many 3D features in the movies (compared with Dreamwork's Monster vs. Alien), but the scenes were awesome and the animation was flawless.
[Score: 5/5] It's a must-see.
And Carl is simply nice!
ps. I know that the image is Copyrighted, if you want me to remove the image, please tell me so.