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 occur when slamming down the mouse if debounce time is set to 0/1 or 2 ms.

Buttons

Main buttons on the OP1we are good to very good. Pre-travel is very low, and post-travel moderate, but button response is somewhat dull and muted nonetheless, with the right one being louder than the left. This continues to be the case with lighter-binned switches, and thus appears to be a function of the shell. While the buttons are visually separated from the shell, lateral button movement is minimal and cannot even be provoked much if at all. Button stiffness is medium. A pair of Kailh GO switches are used.


Side buttons are very good to excellent. Both pre and post-travel are low to very low, resulting in a snappy button response, though feedback differs between the forward and back button, and could be more pleasing. The pressure point is even across the entirety of these. Button size and placement are very good, as actuation is possible rather easily by rolling one's thumb across. A set of Kailh GM 2.0 (20 M) switches is used for these.

At the bottom of the mouse is a single button for cycling through the set CPI levels, which works just fine. A seemingly unbranded tactile switch is used for this one. The slider at the bottom switches between on and off-state, and works just 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 TTC (white or "silver") and has a height of 9 mm. The middle (scroll wheel) click requires high force for actuation. Another Kailh GM 2.0 (20 M) switch is used for this one.

Surface

The OP1we has a smooth 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

Below is a demonstration of the Kailh GO switches binned for an actuation force of 60-65 gf, which are available for separate purchase.

Disassembly

Disassembling the OP1we is trivial. The two screws are readily exposed, and after removing them, top and bottom shell can be separated with ease. When separating the top and bottom shell, make sure not to rip the cables going to the top shell.

The design is highly efficient. The main and side buttons sit on their own PCB screwed into the top shell and connected through a 4-pin connector to the main PCB. A plastic assembly holding the battery is erected above the sensor and secured with three screws, with an additional fourth screw solely for affixing the main PCB to the bottom. All PCBs are very thin. The MCU is a CompX CX52850.


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