I never expect too much from a Sandler movie. My favorites of his are "Happy Gilmore" and "Anger Management". I was pleasantly surprised to find a decent amount of laughs in it. Nothing like "40-Year-Old Virgin", but still, not bad.
One of my favorite characters was a Japanese minister played by Rob Schneider (he is basically unrecognizable in the role). The following line of dialogue had me cracking up:
Japanese Priest: Now place the ring on his hand. A ring is like a circle, it goes on forever. It's not like a triangle, triangle have corners. It's like a circle.
At the one hour mark, I was saying to myself, "Damn, this is a fun movie. I love it when my expectations are surpassed. Nice!". But my happiness was short-lived as the laughs came to a screeching halt a few minutes later (a boring courtroom sequence really killed the momentum of the movie).
Overall, I'd give it a B. If you're a Sandler fan, you'll most likely find much to like. If you're not, then you know to stay away.