I'd never heard of this film when it came out in cinemas and only found it by accident whilst looking for something else online but what a great find it was. I'd never seen any of the actors in anything else before, except J.K. Simmons, but the acting was very good. It was a very interesting mix of science fiction and horror but that only added to it's appeal for me. There's a small plot twist at the end before finishing with what I thought was a bit of a cliffhanger but I'm not going to spoil it for others. My advice, just watch it and see for yourself!