Build Quality

Overall build quality is solid. There is a slight rattle when shaking the mouse, which disappears when keeping the left button pressed. When applying lateral pressure, the left side emits a creaking noise. Additionally, the left side has some minor flex. It is impossible to activate the side buttons by squeezing the sides with any amount of force. Lastly, no accidental clicks occur when slamming the mouse down.

Buttons

Main buttons on the Mira-M are excellent. Both pre and post-travel are virtually nonexistent, resulting in a snappy and satisfying click response. Since the main buttons are separated from the shell, minor button movement can be provoked, but it's not noticeable during use. Button stiffness is light. Omron D2FC-F-K (50M) (China) switches are used for these.


Side buttons are excellent. The forward button in particular is impressively snappy, with a very even actuation point. The back button isn't as good, but both pre and post-travel are low, resulting in a clicky button response. Button size and placement are good as actuation is possible rather easily by rolling one's thumb over these. Additionally, the side buttons are bulged instead of flat, which makes it easier to grip these by feel. Huano switches (blue shell, white plunger) are used here.

At the top of the mouse is a button for cycling through the set CPI levels. Its click feel is decent. An unbranded tactile switch is used for this one.

Scroll Wheel

The scroll wheel is good. Neither scrolling up or down produces any unwanted noise. The individual steps sorely lack separation though, which results in poor tactility. Much like on the Mira-S, scrolling is light to where I'd inadvertently scroll instead of clicking. The encoder is a black TTC. The middle scroll wheel click requires medium force for actuation. Another unbranded tactile switch is used for the wheel click.

Coating

The Mira-M has a matte coating all over. It's very grippy and 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 Mira-M is very easy. Just remove the two bottom mouse feet, unscrew the screws, and pop the bottom shell off, which is merely clipped in at the front. The internal design is a spitting image of the Mira-S. In fact, everything is exactly the same but for the cable-routing above instead of below the PCB. Personally, I prefer the latter solution. Onto the design. Nearly everything sits on a single PCB. The side and top buttons have their own PCB screwed into the top shell and connected to the main PCB through a 4-pin JST connector. Additionally, a small elevated PCB is attached to the scroll wheel for illumination. All PCBs are rather thin in order to keep the weight low. Also notable is how small the main PCB is. Production date for the main PCB is the 21st week of 2020—16th of May, to be precise. The MCU is a Bayi BY8948-00006; it can also be found on the Glorious Model D or O-, among others.


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