when you have a crosshair cleo, you will always have a crosshair in the middle of your screen, just like in vice city. So that you will always know where to shoot. Without the cleo, if you are not a skilled fighter, first you have to aim, figure out where the crosshair is, and then shoot the target by arranging the crosshair on him. But with this cleo, you will always know where the crosshair actually is, so you will be more precise at shooting your targets. Useful while running&looking behind at the same time.