Starts off extremely well, becomes extremely bad. A real shame.
This movie started off very well and kept me engaged up until around the time when Mr. know it all and do it all scientist proclaimed 'I know what they are' and then went on to quickly rig a bunch of untested energy weapons, armour etc. and figured everything out. After that the plot line turned to absolute *beep*, an insult to intelligence really. It's like the director said 'ok, this went on for long enough, lets wrap this up'.
The plot simply discarded all common sense and along with it any suspense and mystery. Starting from the idea that nobody could contact anyone to get reinforcements using a simple satellite phone or radio, that or a single scientist figuring everything out and quickly building effective weapons that took 'hyperspectrals' down and right down to the idiotic way the 'hyperspectrals' were supposedly manufactured and controlled.
Do yourself a favour, watch the first hour and then turn it off. The movie will leave a much better impression. Otherwise, just like those human brains in vats, yours too will magically vaporise. There's 'science fiction' with a logical, believable plot and then there's science fiction with an idiotic, lets get this over plot, sadly this falls in the latter category.