Build Quality

Overall build quality is very solid. There is a slight rattle when shaking the mouse, which comes from the scroll wheel. When applying lateral pressure, no creaking or flexing of the shell can be observed. Lastly, when slamming the mouse down, no accidental clicks occur.

Buttons

The main buttons of the Sensei Ten are very good. Click feel is slightly subdued, but the very low pre-travel and low post-travel more than make up for that. They're fairly light clicks, although not as light as (e.g.) Logitech clicks. SteelSeries switches with no further details on them are used here.


Side buttons are excellent. Pre-travel is very low and post-travel is low. The pressure point is even across the entire button, for both the forward and back buttons. As for their placement and size, the side buttons are fairly small but well-positioned, which means they can be activated quite easily by rolling one's thumb over them. I don't recognize the brand of the switches here, looks like a stylized "CF," "JC," or "JD."

A single button for cycling through the selected CPI levels can be found at the top of the mouse. Its click feel is decent. An unbranded square switch is used for this one.

Scroll Wheel

The scroll wheel is decent. It's noisy 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 fairly little force for actuation. Another unbranded square switch is used here.

Coating

The Sensei Ten is covered in a matte UV coating all over. It's very grippy and doesn't attract finger prints, dirt, and the like 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

Taking the Sensei Ten apart is fairly easy. Bottom and main shell are held together by four screws, which are located beneath the three main mouse feet. The main PCB holds everything but the side buttons, which sit on their own PCB that is screwed into the top shell and connected through an 8-pin JST connector. The cable is routed below the main PCB, which is affixed to the bottom shell with two screws. It's a fairly clean and elegant design with little to criticize. All PCBs are of moderate thickness. In order to save weight, going with smaller PCBs would have been a viable solution. There are even unused pins on the PCB, so clearly not everything was needed.


Production date for the side-button PCB is the second week of June 2019. The MCU is a STM32F103T6U6A, which is a 32-bit ARM CPU. The datasheet along with further information can be found here.

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