By testing the surface you use for the Proteus Core, users can optimize anything from a high-end mouse pad to a sheet of paper. The Proteus Core boasts two other innovative features: a surface-testing capability and an adjustable weight system. One of the best features of the Logitech software is its ability to scan your PC, determine which games you have installed and automatically create profiles for them. The Proteus Core can store three profiles internally, or a virtually unlimited number of profiles on a computer. While this software lagged behind the comparable Razer Synapse software a few months ago, it has really come into its own in the interim. The Proteus Core runs on the same Logitech Gaming Software as all other modern Logitech mice. Otherwise, it's hard to see how Logitech could have devised a better all-purpose gaming mouse design. Palm players with large hands may find the Proteus Core a bit small for their tastes.

The DPI buttons, located next to the left mouse button, are both remote enough to stay out of the way and large enough to press easily without looking. The thumb buttons are large and distinctive, and the lowest one is ideally situated for a 'sniper' button that lowers DPI - a useful feature in first-person shooters.

Otherwise, Logitech arranged the buttons on the Proteus Core in a very smart layout.

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