This movie has 1 major flaw. There is no one to like. Not 1 character is a "good guy". Without anyone to root for, I didn't care if any of them died, or failed, or succeeded. So there was no real tension or drama, just plot. It is an interesting premiss, but a too plodding and complicated story. I was restless through much of the film. It was far too long. The effects were spectacular though, but that is not enough to make a good film. Who knows, perhaps I will appreciate this film more after multiple viewings on cable.