Build Quality

Overall build quality is very solid. There is no rattle when shaking the mouse. When applying lateral pressure, no creaking 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 the mouse down.

Buttons

Main buttons on the DM2 Supreme are very good. Pre-travel is very low and post-travel is low, which results in a firm and satisfying click feel. Button stiffness is medium. Huano switches (blue shell, white plunger) are used for these.


Side buttons are awful. Pre-travel is massive and post-travel is enormous as well, resulting in a mushy and flimsy click feel. The back button in particular is remarkably poor. There is no real pressure point to speak of, either. Much like on the Zowie EC2-A, a lever design is used for the side buttons, and the results are equally poor. At least button size and placement is good as actuation is possible rather easily by rolling one's thumb over these. The switches are from a company called LJ I do not know.

At the top of the mouse are two buttons for cycling up and down through the set CPI levels. Their click feel is decent. Two switches from CF (red plunger) are used here.

Scroll Wheel

The scroll wheel is very good. Neither scrolling up or down produces any unwanted noise. The individual steps lack separation though, resulting in below average tactility. The encoder is from TTC. The middle (scroll wheel) click requires medium force for actuation. Another Huano switch (white plunger) is used for this one.

Coating

The DM2 Supreme has a matte UV coating all over. It's quite grippy, but does attract finger prints, oils, and finger marks in general like a magnet. Simply touching the mouse left permanent marks I haven't been able to remove. All in all, a below average coating.

Button Sound Test

Disassembly

Disassembling the DM2 Supreme is very easy. Just remove all the mouse feet, unscrew the screws, and pop the top and bottom shell apart. The internal design is even simpler. Everything sits on a single PCB and that's it. The PCB is rather thick. Unfortunately, I'm unable to identify the MCU (it's covered up). Curiously, the PCB isn't screwed in at all, it's merely clipped to the bottom shell.


As for the soldering and general quality of the PCB, the area around the scroll wheel encoder pins looks rather messy.