Well the big twist is pretty the exact same twist from "Moon." It's a valid criticism. The special effects and score were great though. I can't wait until Kosinski directs something where the story lives up to its visual effects and score.
there were many things that took from many other sci-fi stories. probably at least 5 things or more. who cares? I'm not sure what people expect anymore, there are very few things that have not been done in this genre IMO. And when a story takes numerous stories and kind of smashes them together, like this did, it worked out pretty well IMO. If you're going to spend all your time dissecting movies instead of enjoying them while you're watching, then that's your prerogative. But i saw the similarities, and somehow i wasn't outraged. In fact i really like that they put all that stuff together and put together what was overall a pretty cohesive story and one that worked. The acting was good enough, the visuals were amazing, the score was fantastic, and the story IMO was pretty damn good, although it did take form other things, but i don't know how you can't just assume you've seen everything by now in some form or fashion.
I mean, i get the criticisms, I just don't understand how it could completely ruin the movie for people. But that's just me, i do my best to enjoy things instead of pick them apart.