Build Quality

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

Buttons

Main buttons on the MM720 are very good. Click feel is a bit dull, but pre-travel is very low and post-travel low, resulting in a snappy click response. The buttons are separated from the shell, but there is only minor button wiggle. Additionally, I could not make the buttons touch each other. After some use, I noticed the right button making a squeaking sound on occasion. Button stiffness is light. LK optical switches (v2) are used for these.


Side buttons are very good. Both pre and post-travel are low, and the pressure point is even across all buttons. Button size and placement is good as actuation is possible rather easily by rolling one's thumb over these. Huano switches (green plunger) are used here.

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

Scroll Wheel

The scroll wheel is very good. Scrolling up or down produces barely any noise, and the individual steps are quite nicely separated, resulting in above average tactility. The encoder comes from LK (E11). The middle (scroll wheel) click requires medium force for actuation. Another Huano switch (green plunger) is used here.

Coating

The MM720 has a smooth 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 MM720 isn't too complicated. First, remove the bigger upper skate and punch a hole through the sticker in the same position as in the picture. With that done, remove all the screws. Top and bottom shell are additionally secured by four clips at the sides and the back. The internal design is pretty straightforward. A rather large diffusor at the back diffuses the light emitted from the rear LED. Except for the side-button PCB, which is clipped onto a vertical mount and connected to the main PCB through a soldered connector, everything sits on a single PCB. An auxiliary PCB next to the scroll wheel provides scroll illumination. All PCBs are very thin in order to save as much weight as possible. The MCU is a Holtek HT32F52352, whose datasheet can be found here. There's also an additional bus transmitter, but I had no luck with identifying it. Production date for the main PCB is July 30, 2020, and this is revision 3.2.


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