Actually, I'd call it one of the better Adam Sandler movies. That's not saying much, but it IS significantly better than most modern comedies.

Edit: http://www.newyorker.com/arts/review..._people_apatow

Of all the film reviewers I've read, those at the New Yorker (Denby and Anthony Lane) are most accurate--they will harsh on a few guilty pleasures that I would have OKed, but generally they are spot on.

The only thing I'd add about it is that the ending is kind of weak. Great start and middle, and arguably Sandler's best work by a mile.

Edit 2:
Spoiler:
Better safe than sorry with spoilers. Yeah, well she is pretty much what hurts the second half of the movie. Though to be fair I think they just didn't know where to go with it. But she was so unconvincing as the old flame, and she's such a mediocre actress, that it really struggled. But the first 2/3 of the movie was surprisingly good.
As I said, much better and less twee than your usual Sandler movie.