About the first half of the movie was slow, and not very funny at all - at least to me. The movie got hilarious during the (SPOILER HERE!!!!) Dr. Phil scene. From then on it was laughs galore. I would not discourage anyone from seeing it. The second part of the movie definitely made it worth it.
I liked the movie. It had some really funny spots. I think peeing in the sink was one of the funniest scenes.
I do think some of it was very predictable. I won't go into details because I don't want to spoil the movie for those who haven't seen it yet. However, in spite of all of that, it was an enjoyable movie and a lot of fun.