This is a great action film with solid acting perfomances. It is actually one of the best action films to hit the big screen in a while. It takes a different perspective on the alien invasion scenario in that it focuses almost exlcusively on the military figthing with the creatures. Think... Black Hawk Down meets Independence Day. You should not go into it expecting anything particulary ground-breaking or any Oscar-worthy performances. And, sure, the film has it's share of cliches, but nothing that stands out as particularly problematic. What you can expect is an edge of your seat, non-stop, intense, and engaging film. This particular alien invasion movie gets it right for a change. The alien invaders, appearance-wise, were not the most impressive bunch of creatures but they sufficiently served their purpose as targets. If you are one who overthinks a film, you could find some arguable flaws. For instance, the unlikelihood of a race of extraterrestrials that can travel the vastness of outer space but for some reason still use rather conventional (and more importantly for this film, "defeatable") warfare tactics. However, it would be a different film otherwise so I digress. Bottom line, if you want to see an awesome action with solid acting then this is an absolute must see.