When comparing Kensington Expert Mouse vs Logitech G400s, the Slant community recommends Logitech G400s for most people. In the question“What is the best gaming mouse?” Logitech G400s is ranked 32nd while Kensington Expert Mouse is ranked 55th. The most important reason people chose Logitech G400s is:
The G400s uses an Avago ADNS S3095 sensor, which does not have any kind of prediction or acceleration issues.
Specs
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Pros
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.
Pro Flawless sensor
The G400s uses an Avago ADNS S3095 sensor, which does not have any kind of prediction or acceleration issues.
Cons
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.
Con Not competitive for its price range
While being an okay mouse the G400s does not have comparable features or specs to mice in the same price range.