It may be derided as one of the ugliest products ever made, but it's also one of the most functional (and we think it looks pretty awesome, too). The Mad Catz Cyborg R.A.T. 7 is an endlessly customizable gaming mouse — it even comes with its own Allen wrench so you can take it apart and reassemble it at will. You can adjust the hardware for a perfect fit, and then tweak the software so that each button responds precisely to your touch. You can even adjust the precision of its laser sensor based on your needs — and how quick on the trigger you are.