I'll rate the movie 5 stars for people who don't have a clue about this subject (which is most of the country) and 4 stars for people who are already in touch with the outright industry travesty. I like the fact that it didn't preach vegetarianism and what you eat, but focused on the health differences of the same exact foods, especially meats. You can still eat your hamburger and bacon, but where and who it comes from could literally be the difference between life and death.
If you come out of this movie and you still eat conventional over organic, then you're a hopeless case and you'll never get it.