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 do not occur.

Buttons

Main buttons on the Pulsefire Haste 2 Wireless are very good. There is some pre-travel, and post-travel is low to moderate, but button response is firm and snappy nonetheless. Despite being visually separated from the shell, button movement is low even when provoked. Button stiffness is medium. A pair of HyperX-branded switches, which are modified TTC Gold Dustproof, are used here.


Side buttons are very good. Both pre and post-travel are low, though the back button in particular can be pushed in further if sufficient force is applied. Button response is firm and satisfying. 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 Kailh switches (orange plunger, gray case) is used for these.

At the top of the mouse is a button for cycling through the set CPI levels, which feels fine. A seemingly unbranded tactile switch (blue plunger) is used for this one.

Scroll Wheel

The scroll wheel is good to very good. Noise levels are elevated, but tactility is quite good, providing decently separated steps and controlled scrolling. The encoder comes from TTC (white or "silver") and has a height of 10 mm. The middle (scroll wheel) click requires low force for actuation. A seemingly unbranded tactile switch is used here.

Surface

The Pulsefire Haste 2 Wireless 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 Pulsefire Haste 2 Wireless is reasonably easy. First, all skates as well as the screws beneath them need to be removed. The top and bottom shell are readily separated then.

The internal design is efficient. The side buttons sit on their own PCB screwed to a plastic assembly which holds the battery, and is connected through a ribbon cable. An auxiliary PCB next to the scroll wheel provides wheel illumination. Everything else sits on the very thin main PCB, which is affixed to the bottom only by three screws also used to affix the plastic assembly, as well as a single screw used for the auxiliary scroll wheel PCB. The MCU is a Nordic nRF52833, whose datasheet can be found here. The production date of the main PCB is the 41st week of 2022, whereas the side-button PCB has been manufactured during the 38th week of 2022.


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