Another happy user of a left-handed classic trackball here! It feels perfectly right in my hand, the 3d printed texture is fantastic and the qmk firmware allow

Another happy user of a left-handed classic trackball here! It feels perfectly right in my hand, the 3d printed texture is fantastic and the qmk firmware allows a level of customization you will never see on more consumer-oriented products. Some drawbacks I can think of are the mouse wheel placement and feeling, the USB type B connector and the included ball that is not perfectly round (there is some sort of tiny nub on top of it that can interfere with the bearings).