We review a lot of mice here at MMORPG, but it's a rare occasion that a new MMO mouse makes its debut. Today, that?s exactly what's happening with the new Logitech G604 LIGHTSPEED Wireless. Featuring 15 programmable inputs, the hyper-fast scroll wheel improved ergonomics, and 1ms LIGHTSPEED Wireless, we're ready to answer the question: is it worth an upgrade?