This is the best mouse I have ever used. If you like a more ergonomic feel and have large hands, this might not be for you. This is a small mouse typically suited for use with a claw grip. If you palm your mouse and enjoy having that much more real estate for your hand, the Naos 7000 is basically the exact same mouse with ridges on the right of the mouse for resting your fingers. Obviously, that design makes the Naos a right handed mouse while the Avior is ambidextrous. The optical sensor in both models is identical and is absolutely top notch.