Performance

Weighing in at about 115g without its cable or weights, the Sentinel III is a rather heavy mouse. It weighs about 137 grams with all of its weights. All the weights being in the back, these have the usual effect of upsetting the Sentinel's balance; however, its shape being a snug palm fit, it does not upset how the mouse feels too much since your grip on it should be very secure. The plastic body is lightly textured, which results in a decent amount of friction, though the amount of friction is inferior to the rubber or soft-touch rubber elements on many other mice. If it doesn't fit your hand properly, its surface will cause issues.

The main buttons on the mouse are light and have a very short travel distance. These buttons are made of separate pieces of plastic. As such, how much force you need to apply doesn't depend on where it is applied, which means you can claw them somewhat. The side buttons are both very solid and have a satisfying click to them, and the button at the very front also feels solid, but is much quieter. However, the two buttons above the mouse wheel are very soft. Sensor-wise, the mouse is equipped with one of the latest and greatest. The Avago SDNS 3988 is an acceleration-free optical sensor that can track at up to 200 ips (508m/s) and at accelerations of up to 50G. The sensor also isn't very picky about which surface you use it on, which had it work on every matte surface I tried, although it got steadily more unreliable as I tried it on glossier and glossier surfaces. As such, you shouldn't experience any issues with tracking as long as you have a mouse mat.

Finally, there are RGB lighting and OLED screen. The lighting at the front isn't very visible on dark surfaces unless you are in a dimly lit room or have the lighting set to a bright color, like cyan yellow or white. The lighting on top suffers from a similar issue since it will be covered by your hand. As such, you really won't be seeing much of the RGB lighting unless you use the mouse on a white surface. The scroll wheel is too dimly lit because it doesn't have its own set of LEDs, instead relying on the bleed the LEDs in front create. The last issue I have with the RGB implementation is its heat output. With the color set to white, the back of the mouse gets noticeably warm. Now, the OLED screen does what it's meant to since it displays information on which profile or DPI setting you're on while allowing for the DPI and lift-off distance to be adjusted without the driver.