January is known as a dump month at the theater, with the perception that films released this month are destined for cinematic oblivion. According to critics, Gerard Johnstone's M3GAN, out Friday, is a clear exception. The PG-13 horror film—in which a roboticist (Allison Williams) enlists the help of a self-learning doll (played by Amie Donald and voiced by Jenna Davis) to protect her orphaned niece (Violet McGraw) at all costs—has a 95% rating from critics on Rotten Tomatoes. Here's what they're saying: