Human input devices (especially the mouse) are very much akin to musical instruments. They are both designed to take the coordinated movements of human hands and transduce them into a predictable yet marvelous output. For instruments the output are sound waves, but on a computer the output can be any imaginable manipulation of a virtual world. In both cases the benchmarks for quality are surprisingly similar. For example, what is it made of, is it well made, does it feel good, is it convenient to use, does it work well and does it look good? With these questions in mind, Benchmark Reviews reviewed the newest release from Mad Catz, the Call of Duty: Black Ops Stealth Mouse. Based on the Cyborg R.A.T. platform the Stealth Mouse adds some style that, for this reviewer, stirs up some new thoughts about the future of gaming mice.