Build Quality

Overall build quality is very solid. There is no rattle when shaking the mouse. When applying lateral pressure, no creaking or flexing of the shell can be observed. Activating the side buttons by squeezing the sides is impossible. Lastly, accidental clicks when slamming down the mouse do not occur.

Buttons

Main buttons on the X2N Crazylight are good to very good. Both pre- and post-travel are moderate to low, resulting in a fairly firm and snappy button response. Being visually separated from the shell, button movement is moderate when provoked. Button stiffness is low. A pair of Pulsar-branded 5-pin optical switches are used.


Side buttons are very good. Pre- and post-travel are very low, resulting in a pleasing button response, although feedback is slightly dull. On the sample of the Medium variant, there is some additional noise when releasing the back side button, which isn't present on the Mini variant. The actuation point is even across the entirety of these. Button size and placement are good, as actuation is possible rather easily by rolling one's thumb across. A set of 2-pin, low-profile switches from TTC (brown shell, blue plunger) are used for these.

At the bottom of the mouse is a button for cycling through the set CPI levels, which works fine. A seemingly unbranded tactile switch is used for this one. A slider at the bottom switches between on and off-state, which also works fine.

Scroll Wheel

The scroll wheel is decent. Scrolling up in particular is fairly noisy, and tactility is below average, with the individual steps having limited separation. The encoder comes from TTC (blue, yellow core), and has a height of 11 mm (Medium). The middle (scroll wheel) click requires medium to high force for actuation. A seemingly unbranded tactile switch (cyan plunger) is used for this one.

Surface

The X2N Crazylight has a matte surface all over. Grip is fine, and it doesn't attract fingerprints or dirt too much. It is easy to clean, and there are no signs of wear left after doing so. All in all, excellent materials.

Button Sound Test

Disassembly

Disassembling the X2N Crazylight is very easy. The screws are found beneath the front and rear skates, and after removing them, top and bottom shell are easily separated. Caution needs to be applied to avoid ripping the cable connecting the two.

The internal design is efficient. The side buttons sit on their own PCBs screwed to the top shell and connected through a ribbon cable to the main PCB. The battery is stuck to the bottom towards the rear. Everything else sits on the very thin and compact main PCB, which has been affixed to the bottom with six screws in total. The MCU is a Nordic nRF52840, whose datasheet is found here. The Bluetooth capability of the chip remains unused. Production date for the side button PCB is the 52nd week of 2025, whereas the main PCB has been manufactured during the first week of 2026.


As for the soldering and general quality of the PCB, I'm unable to find any noteworthy flaws.