It's a mildly amusing film (hence, 4 stars), but as the title of my brief review says, it's ironic that for a movie that is about how to write a movie it's such a predictable and weak story with one dimensional, paper-thin, characters, in which the end of the movie is signaled virtually from the beginning of the film. The writer should have watched the movie before writing the movie, and learned something about how to write a movie - but then it would be a time travel movie.