A+ I don't know what else I should say. Honestly, it was amazing, fantastic, heart-warming, hilarious, impressive (the 3-D was awesome), entertaining (no slow parts), and lots of other positive adjectives.
Within the first 10 or 15 minutes you're crying and completely invested in the characters. And by the end you're almost hoping you can get Christmas cards from the characters because you feel so close to them. And they feel so real!
This movie is great for all ages. It is among the best of Pixar's arsenal, and that's saying a lot considering that movie house is behind Finding Nemo and The Incredibles.
Honestly, my only complaint was that there was no short movie at the beginning. But not like the movie itself has faults.
Rated PG, appropriate for everyone (and, more importantly, entertaining for everyone), etc. Go see it and love it with me. :)