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. Activating the side buttons by squeezing the sides is impossible. Lastly, accidental clicks when slamming down the mouse do occur if debounce time is set to 2 ms or less.

Buttons

Main buttons on the X2V2 are good. Post-travel is low, but there is a decent amount of pre-travel, though button response is firm and snappy nonetheless. Despite being visually separated from the shell, button movement is minimal even when provoked. Button stiffness is medium to low. A pair of RAESHA optical switches (90 M, orange plunger) are used.


Side buttons are good to very good. There is some pre-travel, but post-travel is low, leading to a fairly snappy and pleasant button response. The actuation point is even across the entirety of these. Button size and placement are quite good, as actuation is possible rather easily by rolling one's thumb across. A set of switches from Huano (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. A seemingly unbranded tactile switch is used for this one. A slider at the bottom switches between on and off-state, which also works fine.

Scroll Wheel

The scroll wheel is very good. Noise levels are mostly under control, and tactility is nice as well, with distinct steps allowing for controlled scrolling. The encoder has a Pulsar branding, but comes from F-Switch (blue, pink core), and has a height of 9 mm. The middle (scroll wheel) click requires medium to high force for actuation. A switch from Huano (blue plunger) is used for this one.

Surface

The X2V2 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 barely signs of wear left after doing so. All in all, very good materials.

Button Sound Test

Disassembly

Disassembling the X2V2 is moderately difficult. The screws are found beneath the rear skates. The most difficult part comes after removing the screws, since the top and bottom shell are locked tight with several clips, dislodging of which requires wedging something like a credit card in between. When separating the top and bottom, make sure not to rip the cable connecting the two.

The internal design is simple yet efficient. The side buttons sit on their own PCB screwed to the top shell and are connected through a ribbon cable to the main PCB, and the PCB has been extended such that it improves structural rigidity. The battery is placed towards the rear right on the bottom shell. Five screws are used to affix the very thin main PCB to the bottom shell. The MCU is a Nordic nRF52840, whose datasheet is found here. The Bluetooth capability of the chip remains unused.


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