I liked it.. it's no 2001 or Star Wars but it is a solid movie with a nice twist (if you ignore some plot/logic holes but you have to do that with pretty much most movies these days).
I absolutely loved the production design.. the insect shaped flyer, the combat drones and their living quarters were awesome to look at.
What really impressed me was the idea of taking a bunch of cameras up a mountain and have them film the surroundings 24/7. Then they used the material as the background for their skyhouse and only the light emanating from the screens as the lighting for the scenes. Brilliant idea and a great effect.
The twist was cool once you got the big picture and i liked how one dimensional the alien AI was when it took memories and reintegrated them into its routine for the mop up crew it used to operate/maintain the machines.
It'll not become a classic but it is still a watchable movie.