Great film, and entirely female-led. A touch of body horror, but don't let that turn you off if you're not into that. It's one of the more genuinely unique sci-fi premises to come out in a long time, and I look forward to reading the original novel. Some of the acting was less than stellar, but the movie does a great job of presenting believable characters in an unthinkable situation. I think numerical ratings are reductionist, so I'll just say if you're at all a fan of sci-fi thrillers or horror like Alien, Event Horizon, Dead Space, or even Under the Skin, definitely check it out. Don't watch trailers.