The Mad Catz R.A.T. DWS is okay for FPS gaming. It has low click latency when used with its USB receiver, although it isn't as low as other gaming options. It has a very low lift-off distance, a wide CPI range, and a CPI you can adjust in increments of 100. You can reprogram all of its buttons, and it has a moveable palm section that lets you adjust the length to your hand size. Unfortunately, it's very heavy, and its mouse feet are thin and feel cheap. Note that you can only use the mouse wirelessly.