Summary: I'll spare you with the usual "games based on movies usually suck" intro that most people do for things like this. Truth be told, I downloaded the demo for Up when I first got my ps3 a few months ago, thinking it'd be something fun to play with my daughter since she loves the movie, and since you can play as Dug in this. The demo was decent, and it wasn't as bad as I was expecting.
Summary: I bought this game primarily to play with my kids. I found myself playing it just as much as them but was disappointed in the short game play time. I have a 6 and 8 year old who beat the entire game in under 10 hours of gameplay. Not worth $30 maybe $25.
Summary: After playing the demo, the kids (7 and 9) "had to have this game". The graphics are good and the game is fun, but they lost interest in it after playing only a handfull of levels. Also, I had to help them get past the first flying level or they never would have gotten to the real game! I think they would like it better if you could interact and manipulate the characters.