Build Quality

Overall build quality is solid. When shaking the mouse, there is a minor rattle coming from an indeterminable source. When applying lateral pressure, no creaking or flexing of the shell can be observed. Activating the side buttons by squeezing the sides is possible but requires excessive force. Lastly, accidental clicks when slamming down the mouse only occur if debounce time is set to 0 ms.

Buttons

Main buttons on the M3 are very good. Both buttons have low pre but moderate post-travel, resulting in a very firm and snappy button response. That said, button sound feedback varies greatly depending on where the button is pressed, especially on the right main button. Despite being visually separated from the shell, button movement is low even when provoked. Button stiffness is medium. A pair of Kailh GM 8.0 (80 M) switches are used.


Side buttons are very good (forward) to decent (back). On the forward button, pre and post-travel are fairly low, but the back button has significant post-travel, and can be pushed in almost in its entirety. Accordingly, the actuation point isn't even, and button response somewhat mushy as a result. Button size and placement are quite good, as actuation is possible rather easily by rolling one's thumb across. A set of Huano switches (white plunger) is used for these.

At the bottom of the mouse is a button for cycling through the set CPI levels, which works just fine. A seemingly unbranded tactile switch is used for this one. An additional button cycles through the available polling rates, which too works fine. Another seemingly unbranded tactile switch is used for this one. Lastly, a slider at the bottom switches between 2.4 GHz operation, Bluetooth, and off-state, which also works fine.

Scroll Wheel

The scroll wheel is very good. Noise levels are somewhat elevated, but tactility is very good, providing clearly separated steps and controlled scrolling. The encoder comes from F-Switch (brown, pink core) and has a height of 10 mm. The middle (scroll wheel) click requires medium to high force for actuation. A Huano switch (green plunger) is used here.

Surface

The M3 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 M3 is easy. First, all four skates as well as the screws beneath them need to be removed. After releasing two additional clips on the sides, the top and bottom shell are readily separated, but some caution is advised to prevent ripping the cable connecting top and bottom.

The internal design is reasonably efficient. The side buttons sit on their own PCB screwed into the top shell and connected through a ribbon cable with the main PCB. A vertically mounted auxiliary PCB provides wheel illumination. Everything else sits on the relatively spacious and decently thin main PCB, which has been affixed to the bottom with three screws, leaving the fourth screw post blank. The MCU is a Telink TLSR8273, whose datasheet can be found here. The production date of all PCBs is the 8th week of 2023.


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