Ball size seriously This article should mention something about trackballs with different ball sizes There a re trackballs with balls that can be operated with the thumb Other trackballs are meant to be operated with the middle three or sometimes even more fingers While logitech has the small thumb operated trackballs compare with the big and really big models of Kensington Anyway I think the article should consider this somehow Also the section on computer games and trackballs is completely uninteresting as trackballs are meant as mouse alternatives and more precise this all already implies what this means for gaming