This movie had a couple of big laughs. Its also short enough and paced fast enough that you don't feel completely weighed down by it. The part that throws me off is that this is a Disney family comedy with a lot of material that maybe shouldn't be thrown at the kids. The whole premise is based on a one night stand that produced two kids. I'm not so sure that should be comedic material in a family movie. Its also a lot of cheap humor. Don't get me wrong. I have a very high tolerance for cheap humor and did chuckle at a lot of it, but I will call it like it is.
I wouldn't really recommend that anyone be rushing to check this out. Its not fully for kids, but its kind of too low brow/formula for adults.