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. It's impossible to activate the side buttons by squeezing the sides. Lastly, no accidental clicks occur when slamming down the mouse.

Buttons

Main buttons on the Pulsefire Haste are very good. Pre-travel is very low and post-travel low to moderate, which results in a firm and satisfying click feel. While the buttons are separated from the shell, there is only minor button wiggle. Button stiffness is light. TTC Golden Micro Dustproof switches are used for these.


Side buttons are excellent. Both pre and post-travel are low, resulting in a snappy click response, and the pressure 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 pair of switches from HCNHK (white plunger) is used here.

At the top of the mouse is a single button for cycling through the set CPI levels. Its click feel is good, and a seemingly unbranded tactile switch is used for this one.

Scroll Wheel

The scroll wheel is very good. Scrolling is light and produces barely any noise, and the individual steps are quite nicely separated, resulting in good tactility. The encoder comes from TTC. The middle (scroll wheel) click requires high force for actuation. Another seemingly unbranded tactile switch is used for this one.

Coating

The Pulsefire Haste has a slightly rougher matte coating all over. It doesn't attract fingerprints, dirt, or the likes too much. It's easy to clean, and there are no signs of wear left after doing so. All in all, an excellent coating.

Button Sound Test

Disassembly

Disassembling the Pulsefire Haste is very simple. Remove all the feet and the screws beneath them. Top and bottom shell should now be easy to separate. Nearly everything sits on the main PCB. Only the side buttons are on their own vertically mounted PCB, connected to the main PCB with a 4-pin JST connector that has a plug only on one side. An auxiliary PCB next to the scroll wheel provides wheel illumination. Since that one comes with its own 5-pin JST connector, getting rid of that entire assembly would be a worthwhile measure to reduce the weight even further. Curiously, the sensor lens assembly along with large parts of the PCB are covered, which means I couldn't identify the MCU. Three screws in total are used to affix the main PCB to the bottom shell. Whereas the main PCB is fairly thin, the small side-button PCB is a bit thicker.


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