Let's start with the positives.

It's pretty repairable. Replacement electronics are easily sourced and the 3D printing STL/STEP files are public. It uses the programmable and open source QMK firmware and has a plethora of buttons. Assembly was relatively straightforward. One throughhole component to solder and otherwise just cleaning up some 3D printing mess and screwing a few things together.

Probably about an hour of assembling a kit with good instructions.

But it's definitely not without it's faults.

The scrollwheel is positioned quite far back on the body, offset about a half inch back from the pad of the mouse buttons meaning you really need to crane your finger to pull back and scroll. I often pull my whole hand back on the mouse to use the scrollwheel, which renders this mouse quite uncomfortable for applications that use middle-mouse click and drag.

The scrollwheel mechanism itself is a nightmare.

It has some resistance, but otherwise spins freely. God forbid you stop scrolling just a hair before the next tick of the sensor - any movement as you lift off your finger or nick it as you're pressing a neighboring button and you'll jump another scroll increment in your page. I'd say this happens about 10% of the time and it makes for quite a shaky experience, to the point that I'm almost embarrassed to use this mouse when sharing my screen.

Next up, ergonomics.

The mouse appears to have been inspired by Logitech MX Master 3, which would not be my preferred starting point, but here we are. A lot of folks seem to like these more contoured mice, so I thought it might grow on me, but no luck.

My preference would be a more traditional, symmetric desktop mouse. Although clearly outside the design goals, I'd love to see a future version that would allow for mirroring the housing to make it left-hand compatible.