The movie ripped off the formula for The Family Stone in such a blatant way that I wonder if the same writers just re-hashed the script with new character names. It even included a similar bar scene.
As for cheesy-ness factor: The boys against girls crossword puzzle scene? The dance kick-box scene? Diane Wiest's over-the-top overbearing motherliness? And when did this huge family find time between all their activities to rehearse for that talent contest?
This movie entertains those who enjoy this genre of films despite the repeated use of the same old film formula. And Steve Carell is still about as funny as they come in delivering his lines. But he spends the majority of the movie moping around while being teased by his brother's girl friend and whined at by his bratty daughters. And did I mention the movie was really boring?!