Just beat Aliens vs predator. The marine campaign was pretty bare bones, but still kicked ass. Highly disappointed that you only got to use the smart gun twice in the whole game game. Alien AI sucked balls, but it was still pretty sweet. Predator campaign was by far the most fun. So many different tactics to use and instances where you could use them. Alien campaign sucked big time. There were so many things that the crappy AI could do that you couldn't. Yanking marines into vents and hiding in the hive walls would have been a fantastic addition. On top of that, the controls wouldn't do what they were told to do, 9 times out of 10, I would drop from the ceiling, just to be facing the complete wrong direction. It was thankfully shorter than the other campaigns.
All in all, it was a decent game, good fun. Much easier to overlook the shortcomings if you are a fan of AVP. If you are a fan of the series, I give it a 6/10, if you aren't a fan 5/10. Well worth a rental.