It adds verticality and platforming to the Call of Duty style FPS combined with a very varied campaign that does not overstay its welcome. The problem I have is that still feels to similar to Call of Duty in its gameplay where everything feels too automatic. With Aim Down Sights the shooting parts are just L2->R2 with minimal effort for the player, and it takes away any sense of accomplishment. It's a design philosophy that  tries to take away any annoyance the player might feel, but at the same time takes away any sense of overcoming a challenge.