Let me state from the start that this film certainly could have been worse. With that said, it was far from a stellar offering. The actor that played Jerry Lewis did a good job. However, the actor that played Dean Martin didn't looked at all like him. But that's just casting. The problems with this film is much deeper. To make it brief, the film is a one-sided story filled with inaccuracies, mostly in regards to Dean Martin, his life, his attitudes, and his contributions to, and feeling about, the Martin & Lewis partnership. It's easy to see why Jerry Lewis liked this film. To be fair, the film does touch on Lewis' jealousies of Martin and his need to always be the center of attention. However, it only does so in passing, and avoids really getting into the huge role Lewis' jealousies and bad attitude played in breaking up the team. Furthermore, its portrayal of Dean Martin, and his personal life, is riddled with clichés. Anyone who knows the least thing about the real Dean Martin - not the roles he played in his films or his nightclub act - can easily point out where the film substitutes fiction for truth because it makes a more interesting story, and makes Lewis come out looking better. In short, if you're looking for the truth, this film does not deliver.
