Why is everyone hating on it??
But the guns are something which i think might be lacking in the series as a whole but not specifically in 3. I dont particularly find it any different to use one weapon or the other because of the conditions. A scar could last you through the whole game easily. Every good FPS has a devestating sniper rifle which you can use in alot of situations. Lacking here.
But all in all i think its a great addition in the series. Although part 1 still has to be my favorite.