[Anamon]

Nobody makes thumb trackballs as good as Logitech, or at least not anymore. And I have no complaints about the quality. I have three MX Ergos, replacing my previous Logitech trackballs that all lasted well over 10 years of daily use (the left click switches started getting iffy, but that's probably fixable, so I kept them).

I barely ever hear someone complain about the hardware quality of Logitech mice and keyboards, even before considering how much of them there are compared to Keychrons, Duckys, or all the gamer brands.

The MX Ergo form factor is the best, by the way. Few people go back to pushy-pully mice after they got a taste of how fast and precise they can be with a thumb trackball. I always find it interesting where I see them on TV or YouTube: medical laboratories, architectural offices, movie studios... and Louis Rossmann's desk. I've been using them since the 90s and they probably were an unfair advantage in FPS LAN parties =D

[voltaireodactyl]

Elecom gives them a run for their money thumb ball wise in my experience.