There are no bad Pixar movies

Rating: 10/10 (24 February 2011)

Seriously, there are no bad Pixar movies. Sure, people pick their favorites and least favorites - I have - but even the "last picks" are fantastic. Up is no exception to this high standard.
I personally prefer to watch an hour and a half of beautifully executed character development than a neverending action sequence or special-effects-fest. That's exactly what Up is: a sweet, extremely touching, character-driven movie (with excellent Pixar visuals as a bonus). One of the biggest complaints I've heard about it is that it's boring, and I can definitely understand why some people feel that way. If you're not a fan of cute, and looooots of it, this probably isn't the movie for you.
That being said, find me someone who can honestly say they sat through the "married life" montage without (at least) tearing up. They get you surprisingly early on with the waterworks, and the rest of the movie is devoted towards watching Carl finally learn to live again without the love of his life by his side. I feel like a lot of this movie might actually be lost on the little kids who generally flock to Disney or Pixar creations; a lot of it is about accepting death and letting go of the past in order to love the present. (Hopefully!) there aren't a lot of little kids who fully understand the gravity of this film, but it's got some appeal for parents, and kids will be entertained by the humor and the closing scenes (there is a final action-based showdown, it's just not the focus of the movie).
Up is carried mostly by visuals and emotion, with dialogue less of a focus and more of a gateway to lead the audience into the heart of the film. (Again, if you're not a fan of such slow-paced means of storytelling, Up is probably not the best viewing choice.) Russel, Dug, and Kevin are all adorable and funny in their own ways. They and the ridiculousness of the basic plot (man flies his house to South America in a day using... balloons) bring some lightness to an otherwise emotionally heavy film.
Up is excellently crafted and extremely cathartic. If that's your kind of movie, go watch it - you won't be disappointed.