This is one of those so-so movies that is, really, for the kids or the family with young kids. Worth seeing once, but probably not more...unless you are babysitting your 7 year-old nephew. Kids are the perfect audience since they miss the adult-themed jokes and make the most of the goofy, slap-sticky humor.
If there had been better romantic chemistry - think Sandler + Barrymore - I probably would have liked it a lot more. I just couldn't buy the Sandler + Russell dynamic.