This movie suffers from the expressionless passionless acting of Michael Pena in the lead role. It starts off OK, but pretty soon degenerates into a blow em up and bomb em scenario which I find boring. I guessed the alien thing pretty much straight away so no surprises there. The usual retarded child character got on my nerves - I mean braving death for a soft toy is a bit ridiculous - and would she really be transfixed with terror by a space ship after telling an alien face to face "I am not afraid of your shadow"? Quite what she meant I am still mulling over. The usual "make people think" debate over synthetics is explored - why any idiot would create a race stronger than a human without a suicide button I have no idea but scientists are a pretty stupid bunch of people in this regard it seems. Quite why troops were needed on the ground is a mystery to me - given their fire power they could have annihilated all existence on earth from the air - but no - "an underground headquarters" will never be found as long as you blow up a bridge behind you it seems. One question that intrigues me - how can synthetics forget they are synthetics when they don't need to eat or drink or go to the toilet or copulate or have babies? Surely there is a clue in there somewhere?