The Corsair Nightsword RGB is a large gaming mouse made for right-handed users who prefer using their mice with a palm grip. It's most likely best with hands that are at least 18 cm big, but this is, along with the grip style, mostly a matter of personal preference. Surface and materials are very nice on this device. The main buttons are made out of slightly rough, matte plastic, while the other main gripping and touching areas have textured rubberization on them, which makes the mouse feel great in the hands, with a lot of grip if one picks up the mouse a lot.

Build quality is nearly stellar. This mouse doesn't squeak, creak, or emit any other annoying sounds. The two front CPI buttons can rattle a little bit, which only happens if you shake the mouse vigorously, so it won't occur during regular use. Weight-wise, this rat has a default mass of 120 grams, which you can increase up to 143 grams with some weight cylinders. While a matter of personal prefernce, this mouse is rather overweight in my opinion.

Buttons are good overall, but not perfect. Thankfully, the main ones are fantastic; they are light yet tactile and can be spammed very well. They use Omron switches rated for 50 million clicks. The scroll wheel is also really good; it has well-separated, tactile notches, but is still relatively light to scroll through. The front CPI buttons are pretty good; they are a bit mushy, but still nicely spammable, and light, too. The profile switchers (which are behind the scroll wheel) are like the main buttons, which means they are light and tactile, but the side buttons are pretty much the opposite: the two upper ones are mushy and all of them are pretty hard to press.

Sensor performance is just fantastic. The PMW3391 optical sensor performs as it should. It has a maximum resolution of 18,000 CPI and can be set in 1 CPI increments, which is still unique to this tracking unit. There is no unwanted acceleration, or any sort of angle snapping, but it features some smoothing above 2,000 CPI. It's best used on or below that resolution, but if you're not a competitive gamer, you most probably won't be affected by it.

The mouse feet are pretty bad, especially considering this rodent's price tag. They don't have well-rounded contact edges and aren't very smooth, which sometimes results in some scraping and more friction. There are no replacements for them in the package either, which is a bit outrageous for nearly $80, but this time around, you're better off with aftermarket skates anyways. The cable is essentially the same as on most other Corsair mice, which is bad news since it's very stiff, thick, and heavy, resulting in a lot of resistance and friction. However, it's definitely a durable 1.8 m long cord.

Corsair's iCUE software is a rather heavyweight all-in-one suite for their devices. It's well made overall, but could be simplified and organized better in some sections. I found it to be intuitive and usable, and I didn't detect any bugs while using it, either. If you don't like it installed, you can simply remove the program after setting the mouse up since it has three profiles of on-board memory that can store all settings. Needless to say, RGB lighting is great on the Nightsword RGB. There are four lighting zones that can light up individually, and a vast number of effects and customization options you can fiddle around with are available.

The price for this mouse is $79.99, which is fair if you consider its specifications, but there are some things that ruin the overall price-value ratio. These are mainly the mouse feet and the cable, which are horrendous considering how good other aspects of this mouse are, but I could mention the side buttons as well. I cannot call this mouse an Editor's Choice, but I can definitely recommend it to anyone who finds the shape and specifications suitable for their needs if the mentioned negatives aren't off-putting.