I saw this movie a couple nights ago at the Drive IN! If you haven't been to a drive in lately, please go, talk about a dying industry. They need your support.
Anyway, Up is outstanding. It's very funny, and Pixar makes a story really out of nothing. It is a (I know it's cliche) heartfelt take on aging and youth. Usually Pixar movies are pretty good (hated Cars), but this one is honestly one of the better ones they have done.