Build Quality

Overall build quality is mostly solid. When shaking the mouse, a rattle comes from an indeterminable location. During disassembly, I've found a loose extra screw lying under the main PCB to be the culprit. When applying lateral pressure, some creaking can be observed, and the left side flexes inwards slightly. Activating the side buttons by squeezing the sides is impossible. Lastly, accidental clicks when slamming down the mouse do not occur unless Button Response Optimization is disabled within iCUE.

Buttons

Main buttons on the Nightsabre Wireless are good to very good. Pre-travel is moderate, whereas post-travel is virtually nonexistent. Button response is fairly snappy, though also a bit dull and muted, especially the right one. Despite being visually separated from the shell, button movement is fairly low even when provoked. Button stiffness is medium. A pair of TTC optical switches are used.


Side buttons are good to decent. The two buttons next to the left main button have high pre-travel along with uneven actuation, though this may at least partially be by design to prevent accidental actuation. Of the side buttons proper on the left side, the forward button has fairly low pre-travel, but can be pushed in a decent bit past actuation, and the back button has even more pronounced pre and post-travel. Actuation is mostly even across the entirety of these. Button size and placement are decent, as actuation is possible mostly easily by rolling one's thumb across, though I've found it difficult to do so without hitting the other button. For the buttons next to the left main button, a set of 2-pin low-profile switches from Kailh (green plunger) mounted at an angle is used. For the side buttons proper, a set of surface-mounted switches from Omron (white plunger) is used.

At the top of the mouse are two buttons for cycling up and down through the set software or hardware profiles, which work just fine, though them being arranged horizontally instead of vertically is at odds with the up/down cycling. A set of surface-mounted switches from Omron (blue plunger) is used for these. The slider at the bottom switches between 2.4 GHz mode, Bluetooth, and off-state, and works just fine.

Scroll Wheel

The scroll wheel is very good. Noise levels are under control, and tactility is good, with clearly separated steps allowing for controlled scrolling. The encoder comes from TTC (green) and has a height of 5 mm. Actuating the middle (scroll wheel) click requires medium force. A surface-mounted switch from Omron (white plunger) is used for this one.

The scroll wheel can also be tilted to the left and right, giving access to two additional button functions as well as horizontal scrolling. I didn't encounter any issue with accidentally actuating the middle click when tilting the wheel. Two seemingly unbranded tactile switches (black plunger) are used for these.

Surface

The Nightsabre Wireless has a smooth matte surface on the back, rougher matte surface on the main buttons, and textured, hardened rubber on the sides. The coating on the back is pleasingly soft to the touch, but does attract fingerprints, dirt, or the like somewhat easily. It is easy to clean, and there are no signs of wear left after doing so. All in all, very good materials.

Button Sound Test

Disassembly

Disassembling the Nightsabre Wireless is difficult. The screws are found beneath the single front and the two rear skates, after removing which separating the top and bottom shells is easy, though caution is advised not to rip any cables.

The internal design is highly complex. First, we have the top-shell PCB, which holds the two switches for the profile buttons, and has two ribbon cables going to PCBs holding multiple LEDS for the lighting zone at the top. A ribbon cable connects the top-shell PCB to the main PCB. Second, we have the side-button PCB screwed to the left-side shell wall, holding the two switches for the side button next to the left main button and two switches for the side buttons proper, and this PCB likewise is connected through a ribbon cable to the main PCB. Atop the main PCB, a plastic assembly holding both the battery and the main-button PCB is mounted, the latter of which also holds the tilt-wheel switches, whereas the scroll wheel switch sits on the main PCB. The scroll wheel encoder itself is encased in the scroll wheel and connected to the main-button PCB through a 3-pin connector, while the main-button PCB is connected through a ribbon cable to the main PCB. Only a single screw is used to affix the main PCB to the bottom shell. The MCU is a Nordic nRF52840, whose datasheet can be found here. Production date for the main PCB is the first week of 2023.


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