Saw it last night. Quite good, if I do say so.
Specifically, I adore the exo-suit. It's everything powered armour should be, presented in a a believable fashion and displaying the capabilities true armoured exoskeletons designed for combat should have. When you get right down to it, it's a person wrapped in a main battle tank. It even presents an outward view of the HUD! Very, very cool moments.
Also, the lighting gun that exploded people was pure sex.
Generally, an extremely interesting look at the alien invasion trope. No destroyed cities, no biological infiltration, just good old fashioned people acting completely human in the most depressing way possible.