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 unless debounce time is set to 0 ms.

Buttons

Main buttons on the DM8 Mini Pro are good. On the left button, pre-travel is very low and post-travel moderate, whereas on the right button, pre-travel is moderate and post-travel very low, though button response is firm and snappy nonetheless. Being visually separated from the shell, button movement is moderate to high when provoked. Button stiffness is medium. A pair of Kailh GM 8.0 switches are used.


Side buttons are good to very good. Pre- and post-travel are low for the most part, resulting in fairly pleasant actuation. 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 Huano switches (white plunger) are used for these.

At the bottom of the mouse is a button for cycling through the set CPI levels, which works just fine.

Scroll Wheel

The scroll wheel is decent to good. Noise levels are high when scrolling up in particular, but tactility is above average, as the individual steps are fairly distinct. The encoder comes from F-Switch (black, orange core) and has a height of 11 mm. The middle (scroll wheel) click requires high force for actuation. A switch from a company named "Lucu" (red plunger) is used for this one.

Surface

The DM8 Mini Pro has a matte surface all over. Grip is fine, and it doesn't attract fingerprints or dirt too much. It is fairly easy to clean, and there are barely any signs of wear left after doing so. All in all, very good materials.

Button Sound Test

Disassembly

Disassembling the DM8 Mini Pro is very easy. The screws are found beneath the front and rear skates. After removing those, the top shell may simply be taken off.

The internal design is somewhat inefficient. The side buttons sit on their own PCB slotted into two posts part of the bottom shell and connected to the main PCB through a 3-pin connector. Three screws are used to affix the moderately thin yet needlessly spacious main PCB to the bottom shell. The MCU is a Holtek HT68FB560, whose datasheet can be found here.


As for the soldering and general quality of the PCB, I'm unable to find any noteworthy flaws. Somewhat curiously, of the six screw posts available for the main and side-button PCBs, only four are actually used.