GameBall Daumen

Came from the Logitech MX Ergo which I had bought 2 times already due to rubber issue. This mouse doesn’t have that and the feel of the trackball is excellent.
I would suggest some software to make customizing easier but the links to the open source repos work well enough for now.
If u love a thumb trackball, just buy this.

This mouse gives two settings for the mouse position to alleviate the pressure on the wrist for those long sessions. Multiple DPI settings allow you to dial in sensitivity to your liking. For all you RGB junkies, you have multiple colors to switch to. I have fairly large hands (L-XL gloves) and this bad boy nestles perfectly in my palm. You can use it with or without the supplied power cable (I prefer corded) and still have a quick response time, and for me, the scroll wheel has those little notches as you move it to give that tactile feedback. five out of five stars, Thank you, this mouse is exactly what I had been searching for and I will be returning to see if you guys make it in any other colors (Black is the standard, but some of us like a little more flair to their setup, I want royal blue, but I know that is just wishful thinking).

Smooth, ergonomic, sensitive, and a superb price for 1000Hz polling rate. The sensitivity is extraordinary - I had to turn it down a lot to get the control I needed, because my thumbs just aren't that precise! But doing so is very straightforward and did not restrict my freedom of movement in-game. In fact, a quick spin of the ball has me turning faster than I could with a mouse, even with the sensitivity turned down. More dextrous players than I will probably benefit from higher dpi options. For me, perhaps a finger-ball would have been a better choice, but I have no regrets.

There are no doubt disadvantages to trackballs vs. mice for gaming, especially fps, but for the first time I feel that trackballs can offer different advantages that can give you an edge in other ways. Highly recommended to save desk space, reduce RSI risk, or simply as another tool in the arsenal for any gamer.