Its the hours and hours of KZ/surf gameplay. Both mouse movement, wasd and mouse wheel scroll control is something you master much faster playing kz/surf than deathmatch. And dont get me started on the eye to hand coordination, you feel absolutely like ONE with your mouse and mousepad. Of course, this alone will not grant you any of the basic skills and knowledge you get when playing tons and tons of competitive and retake/execute servers, but it does train your mechanics much much better, and helps you find how your shoulder/elbow/wrist and figers should sitting. There is a huge difference between tilting your wrist to the left and to the right, all those little details you need to master, all the small muscle groups from your shoulder to the tip of your fingers should be in your total control. Really feeling that you can move your hand there and the crosshair will be dead center of it is an incredibly blissful feeling. Everyone feels this a couple of times in a game, its like you know you get a headshot before youve even fired the gun. Its like a drug really haha