This game is great! The FPS world must look at it to see how things are to be done! Great story, excellent audio, unique setting (I do not remember any other game taking place in an african local conflict, great idea!), deep interaction with the environment, realistic physics effects (even if the game is not realistic at all, it's an FPS, not Armed Assault) and, even if it is not important at all after all these things, the most beautyful graphics ever seen (sunsets are true magic, you can sit with your girlfriend and look at them :) )!
The only negative things are: the constant (and unrealistic) attacks by EVERYONE you meet, too fast enemy respawn at checkpoints and too fast weapons degradation (rust spreads like a virulent infection on my AK!).