Build Quality

Overall build quality is quite solid. There is a slight rattle when shaking the mouse, but I haven't been able to determine where it's coming from. When applying lateral pressure, some minor creaking of the shell can be observed. Notably, the right main button sits visibly higher than the left main button (and the rest of the top shell) on my copy. Lastly, when slamming the mouse down, no accidental clicks occur.

Buttons

Main buttons on the DM5 Blink are very good. There is minor pre-travel and moderate post-travel, but button firmness and feel result in a highly satisfying click response notwithstanding. Button stiffness is medium. Huano switches (blue shell, white dot) with a rating of 20 million clicks are used for these.


Side buttons are below average. The forward button in particular has a good amount of pre and post-travel and feels loose. Both side buttons suffer from a mushy click feel and an uneven pressure point. Especially when the button is actuated towards the rear does the pre-travel become unbearable. The sniper button on the other hand is very decent; I have little to complain there. Huano switches (red dot) are used for the side buttons.

On the top of the mouse are two buttons for cycling up and down through the set CPI levels. Their click feel is decent. Huanos switches (white dot) are used for these buttons as well. On the bottom are two sliders: one for polling rate and an on/off-slider, which serves zero purpose on a wired mouse. Both of these are of abysmal quality, which makes it unnecessarily difficult to set the desired polling rate.

Scroll Wheel

The scroll wheel is good. It's fairly quiet when scrolling, and the steps aren't very noticeable, but other than that it works well (i.e., no accidental scrolls or anything like that). The middle (scroll wheel) click requires moderate force for actuation. Yet again, a Hunao switch (green dot) is used for the wheel click.

Coating

The DM5 Blink has a black UV matte coating. 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. On the sides is a riffle pattern, which does provide decent grip (and accentuates the DM5's RGB lighting), but much like on the Razer Basilisk (where it's a grip piece) it's rather tedious to clean.

Button Sound Test

Disassembly

Taking the DM5 Blink apart can be a bit tricky. It requires not only the removal of the four screws located beneath the three main feet, but also the removal of the sniper button, as demonstrated here. Once that is done, the top shell comes off fairly easily. Some caution is needed as there is a PCB for the side and top buttons screwed into the top shell, and wired to the main PCB. The design itself is rather complex, which comes as no surprise considering the amount of buttons the DM5 has.


In the top shell picture you can see the translucent inner shell which disperses the light emitted from the PCB-mounted LEDs. You can also see the reason why the side buttons are as mushy as they are: although the switches have direct contact with the buttons, the structure supporting them has fairly long and flimsy stems which do not create enough resistance.


I count no less than five separate PCBs in total. There is the main PCB which has the sensor, MCU/IC, and the LEDs on it. The main-button PCB has the main button switches, the scroll wheel, and the wheel click switch on it and is connected to the main PCB with a ribbon cable. There's also another smaller PCB mounted on to the main-button PCB. Right next to the main-button PCB is another one for the sniper button. Lastly, the side-button PCB has the side and top button switches on it. The thickness of all these PCBs is above average, so going with slightly thinner PCBs would have been a viable solution to save some weight. The "1933" marking on the PCB indicates the production week.

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