So close but yet so far...
The PROs: combat system, flying with the jet pack, story concept.
The CONs:
Random cutscenes would crash to the desktop. This happened when you pickup the machine guns at the beginning & when you go to cross the first bridge with the two aliens. I skipped these (enter or E) and the remaining cutscenes played fine.
The load on my computer was surprising (AMD quad core and AMD 5850) - it ran fine but I could hear the fans running. Usually I don't hear them (even in Crysis, Mass Effect 2, Just Cause 2, etc...).
I also had this strange situation where the game towards the end changed from 3rd person to 1/4 3rd person (it was really strange).
The flying mechanics are good once you get used to them.
The game it kind of repetitious and only lasts about 6-8 hours.