Up is an average movie game. The plot's the same as the movie, which is still very good, but isn't as awe inspiring as seeing it in a theater. The game could have been a lot better if they spent more time on enhancing the quality of the gameplay, as in not making people shake the Wii-Mote every 5 seconds. Also there are drops in framerate, they appear irregularly.
The voice acting is grea. If you're either a parent or a young child ( you probably shouldn't be on the internet if that applies to you), then this is the Wii Game for you. Everyone else, go pick up "Punch-Out!".