Build Quality

Overall build quality is very solid. There is no rattle when shaking the mouse. When applying lateral pressure, minor creaking but no flexing of the shell can be observed. However, when pressing at a specific spot below the back side button, a clicking noise can be provoked. Activating the side buttons by squeezing the sides is impossible. Lastly, accidental clicks when slamming down the mouse do occur with the debounce time set to 1 ms, albeit very rarely, and not at all if set to 2 ms.

Buttons

Main buttons on the BOLT are good to very good. Both the left and right button have moderate pre but fairly low post-travel, while the click feel itself is firm and snappy. The buttons are separated from the shell and lateral movement can be provoked, but typically isn't noticeable during regular use. Button stiffness is medium to heavy. A set of Kailh GM 8.0 (80 M) switches is used.


Side buttons are good. Pre-travel is fairly low and post-travel nonexistent, but the button response is muted and dull, accompanied by a hollow sound. Furthermore, the pressure point isn't even across the entirety of these. Button placement is good as actuation is possible quite easily by rolling one's thumb across. A pair of tactile switches from LXA is used for these.

At the top of the mouse is a single button for cycling through the four profiles. Its click feel is good. I do not recognize the brand of this switch. At the bottom of the mouse is a slider that switches between Bluetooth, 2.4 GHz and off-state, which works just fine.

Scroll Wheel

The scroll wheel is very good. It is fairly noisy when scrolling in either direction, but tactility is great, providing clearly discernible steps and highly controlled, albeit somewhat stiff scrolling. The encoder comes from ALPS and has a height of 11 mm. The middle (scroll wheel) click requires medium force for actuation. A seemingly unbranded tactile switch is used for this one.

Surface

The BOLT has a a slightly rougher matte surface all over. It doesn't attract fingerprints, dirt, or the likes too much. It is easy to clean, and there are virtually no signs of wear left after doing so. All in all, very good materials.

Button Sound Test

Disassembly

Disassembling the BOLT is moderately difficult. The biggest challenge is finding all the screws. The first two sets are easy enough to find and located beneath the two large feet, but the third is very well hidden below the sticker. Furthermore, due to the bottom shell having hexagonal holes, finding the right spot can be particularly difficult. Three sets of two screws is no doubt excessive, and at least one of them is entirely superfluous. For instance, doing without the front or middle set and using clips instead would have been a perfectly reasonable design approach. Thankfully, once the screws are dealt with, separating top and bottom shell is possible without issue.

The internal design is fairly efficient. Everything save for an auxiliary PCB next to the scroll wheel providing illumination sits on the main PCB. The side buttons are mounted vertically, while the battery sits on a plastic tray affixed by three screws. Only a single additional screw is used to secure the main PCB, which is very thin to save as much weight as possible. Most of the components are found on the underside, including the MCU. The MCU is a Nordic nRF52833, whose datasheet can be found here.



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