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. Lastly, with the "Zero Debounce" function disabled (default), no accidental clicks occur when slamming the mouse down. With said function enabled, however, so-called "slam clicks" do occur. This is intended behavior and therefore entirely in line with expectations. For further details on said function please refer to the Click Latency section on the next page.

Buttons

Main buttons on the Kone Pure Ultra are good. There is very low pre-travel and moderate post-travel, which results in a firm and satisfying click feel. The left button, however, emits a rather unpleasant "thonk" upon release, which is something I already noticed negatively on the previous Kone Pure Owl-Eye. Button stiffness is medium to light. D2FC-F-K (50M)-RT Omron (China) switches are used for the main buttons.


Side buttons are excellent. Pre-travel is virtually non-existent and post-travel low. The pressure point is even across the entire button, and the click feel is satisfying. Button size and placement is quite good as it's possible to actuate these rather easily by rolling one's thumb over them. Switches are red TTC.

At the top of the mouse are two buttons for cycling up and down through the set CPI levels. Blue TTC switches are used for these. Their click feel is decent.

Scroll Wheel

The scroll wheel is excellent. It's very quiet when scrolling up and down, and the steps are nice and tactile. ROCCAT is known for excellent scroll wheels, and this one is no exception. The middle (scroll wheel) click requires moderate force for actuation. An Alps encoder is used here. The switch for the wheel click is another red TTC.

Coating

The Kone Pure Ultra 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 aside from some finger oil marks I couldn't quite get rid of, there are no signs of wear left after doing so. If you know the coating of the Kone Pure Owl-Eye then this one will feel very familiar. All in all, an excellent coating.

Button Sound Test

Disassembly

Disassembling the Kone Pure Ultra is as straightforward as it gets. Remove the two big mouse feet and the four screws before pulling the cable stress relief, which should have the top shell come off beautifully. The interior design is close to perfect. The side and CPI button switches sit on a separate PCB, which is screwed into the top shell and connected to the main PCB through a ribbon cable. A small PCB is mounted on to the main PCB in order to elevate the scroll wheel, whose encoder would otherwise sit too low. The cable connector sits right at the front, which minimizes potential cable-routing issues and also saves weight by having as little cable as possible inside the mouse shell. The main PCB has a "2019-07-11" marking (production date) on it. There's some stuff on the MCU that makes it difficult to read what's written on it, but I'm fairly confident that it's a Holtek HT32F52352, which is a 32-bit ARM Cortex MCU. Please refer to this for the datasheet.


In the top shell picture, we can see the diffusor for the PCB-mounted rear LED and several hexagonal holes being part of the inner shell. The same pattern can be found on the bottom shell. If I had to take a guess I'd say that the weight saved by this measure isn't that much. Rather, it appears that the lower weight compared to the Kone Pure Owl-Eye has mostly been achieved by the smart interior design and thinner main PCB.

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