When comparing Anker CG100 vs Kensington Expert Mouse, the Slant community recommends Anker CG100 for most people. In the question“What is the best gaming mouse?” Anker CG100 is ranked 50th while Kensington Expert Mouse is ranked 55th. The most important reason people chose Anker CG100 is:
Profiles can be custom made in the drivers for the 4 different DPI settings. Your current profile is shown with the 4 lights by the left mouse button.
Specs
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Pros
Pro Quick DPI Change
Profiles can be custom made in the drivers for the 4 different DPI settings. Your current profile is shown with the 4 lights by the left mouse button.
Pro 2 profiles can be saved to the device
Two user profiles can be saved to the device with a switch on the bottom of the mouse.
Pro Adjustable weight in base
Option to add 8 cylindrical weights to base of the mouse (weights included) from 140g to 160g..

Pro Comfortable and ergonomic
With thumb and pinky on the buttons and three fingers controlling the ball, the user's wrist lays flat on the table (or on the provided attachable wrist rest).

Pro Intuitive link between ball motion and FPS camera angle
The ball is large enough for turning it to feel like physically rotating an object.
Cons
Con Macro Button Placement
Placement of the macro button by the scroll wheel means there is accidental presses.
Con Not a mouse
This is a trackball, not a mouse.

Con Questionable secondary button defaults
The upper left button, which is the hardest to use, is middle click by default. The upper right, which the ring finger naturally rests near, defaults to Back. This can be particularly annoying as the Back button is easy to brush when moving hands between keyboard and mouse.
