Review with Hardly Any Spoilers
UP is an excellent film. really well thought-out and executed, with some very memorable characters.
it is not, however, at quite the same level as pixar *masterpieces* like WALL-E, THE INCREDIBLES, RATATOUILLE and MONSTER'S INC. almost, but not quite.
many of the funniest moments were spoiled by commercials and previews, unfortunately, but that happens all too often these days.
it is a real tear-jerker at times, especially in the opening 10 minute montage where they show the entire life of the old dude leading up to the start of the movie. this entire sequence is beautiful.
bottom line: everyone should go see this movie. but don't expect it to be pixar's best movie ever, as some of the more retarded critics have claimed.
flashy - the 3D is really not a major factor in this movie, and not worth the hassle of wearing the glasses for 1.7 hours. if i saw this again, i would opt for the regular 2D version. (you can watch much of it without the glasses - and i did, occasionally, when i wanted to give my eyes a break - as many scenes have no 3D at all.)
kate - the movie would be fine for an almost 4 year old. the story is easy to follow and the characters would be hilarious for kids that age.