I laughed through the entire movie. Sandra Bullock and Ryan Reynolds are an awesome comedy team. They play so well off of each other you actually believe they are going through this whirlwind romance/sham.
The only part that saddens me is that I cannot recommend this movie to any friends or family due to Hollywood's incesant need to put as much nudity in as the audience can handle. The entire scene could have been tastefully done without having to show a completely nude Sandra Bullock , covering herself with a glove, for more than 5 minutes. - but as usual that is what people pay to see.