Perhaps my phrasing was a little harsh, but yeah I thought the first 15 minutes of Up were drastically better than the rest of the movie and by the end of it I remember rolling my eyes at quite a bit.
Those are my exact thoughts on Up except that I barely hold it higher than Cars....in fact I may like Cars better!
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I do because I can.....and because I'm bored.
http://img337.imageshack.us/img337/4565/mgrok.png