Mostly funny but too often too lame.
The story is a classic for Body Swap-theme movies. Both guys wants the other guys life and then suddenly realise that they liked their own better and now even more. There is nothing wrong with that.
For the most part the comedy is also entertaining, but at several points during the movie my toes curled up so hard, that I almost changed the DVD. That is too bad.
At certain points the movies actually tries to be serious, as it is concerning some of the very typical and normal aspects and fears of grown-up life with a wife, a job and children, but the lame comedy in between just destroys any credibility for that.
I think a rating of 5 is generous, but this might be due to the pretty women in the film.
Btw. it is a body-double.