This movie appears to get a mixed reaction among film fans, yet I found it an intriguing, thought provoking film, that - yes, I agree - asks more questions than it answers, but is that a bad thing? I found that reflective of life itself. There are indeed so many things we human beings will likely never find answers to, so I do not really buy peoples arguement on that.
If you're a fan of Alien, and expecting more of the same, you're likely in the wrong place, though there are echoes of that movie reverberating from each scene here. Visually, its more impressive than Alien, and possibly one of the most outstanding films I have seen in that regard. Rapace is perhaps no Sigourney Weaver, but doesnt try to be, and she is on fine form. As are all the leads. With Michael Fassbender perhaps stealing the show.
Its inevitably going to be a film that you have to see for yourself and come to your own conclusions. I believe it will stand the test of time and gain more appreciation as time goes by.