Build Quality

Overall build quality is solid. There is no rattle when shaking the mouse. When applying lateral pressure, minor creaking and flexing of the shell can be observed, and when pressing at a specific spot below the forward side button, a gap between the top and bottom shell can be provoked. Activating the side buttons by squeezing the sides is impossible. Lastly, accidental clicks when slamming down the mouse do occur regularly if debounce time is set to 0 ms and very rarely if debounce time is set to 2 ms.

Buttons

Main buttons on the Model D Wireless are very good. The left one has moderate pre and post-travel, while the right one has low pre and post-travel. Button response is very firm and snappy, though feedback is slightly duller on the left button. Despite the buttons being visually separated from the shell, lateral button movement is minimal. Button stiffness is medium. A set of Kailh GM 8.0 (80 M) switches is used.


Side buttons are very good. Both pre and post-travel are low, resulting in a firm and snappy button response. The pressure point is mostly even across the entirety of these. Button placement is great as actuation is possible very easily by rolling one's thumb across. A pair of Huano switches (green plunger) is used for these.

At the top of the mouse is a single button for cycling through the set CPI levels. Its click feel is good. Another Huano switch (green plunger) is used for this one. At the bottom of the mouse is a simple on/off-switch, which works just fine.

Scroll Wheel

The scroll wheel is very good. Noise levels are appreciably low, and tactility is very decent, with clearly discernible steps. The encoder comes from F-Switch (brown, green core) and has a height of 13 mm. The middle (scroll wheel) click requires high force for actuation. Yet another Huano switch (green plunger) is used here.

Coating

The Model D Wireless has a smooth matte surface all over. It doesn't attract fingerprints, dirt, or the likes 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 Model D Wireless is quite easy. First, remove the two rear skates and the screws beneath. Once those are taken care of, simply pop the top and bottom shells apart, which are kept together by two clips at the front and two on the sides. Some caution ought to be applied as several cables connect top and bottom.

The internal design is pretty much as efficient as it gets. The battery is located on the side-button PCB, which is screwed to the top shell with two screws. A 3-pin JST connector connects the battery to the main PCB, while a 4-pin connector connects everything else. Two ribbon cables coming from the main PCB power the side LED strips. An auxiliary PCB next to the scroll wheel provides wheel illumination. The main PCB itself is absolutely packed. While the side-button PCB is very thin, the main PCB is of medium thickness. No more than a single screw and two pins are used to affix the main PCB to the bottom shell. The MCU is a Nordic nRF52840, whose datasheet can be found here.


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