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.

Buttons

Main buttons on the Viper V3 Pro are very good. Pre-travel is low to moderate, and post-travel is moderate, resulting in a firm and snappy button response nonetheless. Despite being visually separated from the shell, button movement is low even when provoked. Button stiffness is medium. A pair of Razer-branded 3rd-generation optical switches are used.


Side buttons are good to very good. Pre-travel is low (forward button) to moderate (back button), whereas post-travel is very low. That said, button response is somewhat unsatisfying, as feedback is largely lacking. The actuation point is even across the entirety of these. Button placement is good as actuation is possible very easily by rolling one's thumb across. A set of surface-mounted switches (beige plunger) from CF (ChangFeng) are used for these.

Underneath the mouse is a single button which either cycles through the set CPI levels if pressed briefly or turns the mouse on or off if pressed and held, which works well. A seemingly unbranded tactile switch is used for this one.

Scroll Wheel

The scroll wheel is excellent. Noise levels are mostly under control, and tactility is great, with clearly defined steps allowing for controlled scrolling. The encoder comes from TTC (blue, white core) and has a height of 8 mm. The middle (scroll wheel) click requires high force for actuation. Another switch from CF is used for this one.

Surface

The Viper V3 Pro 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 no signs of wear left after doing so. All in all, excellent materials.

Button Sound Test

Disassembly

Disassembling the Viper V3 Pro is easy. Torx T6 screws are found beneath the front and rear skates. After removing those, two additional clips at the sides need to be dislodged, which is easily done. When separating top and bottom shell, make sure not the rip the cable connecting the two.

The internal design is uncommon yet highly efficient. A plastic assembly is screwed into the top shell, which holds the side-button PCB along with a PCB holding the main button switches and scroll wheel, both of which are connected through an FFC to the main PCB. The main PCB is very compact and thin, and four screws are used to affix it to the bottom shell. Of particular note is the antenna construction. The MCU is a Nordic nRF52840, whose datasheet can be 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.