If you use only this trackball, then they interfere a little: the hardness of pressing the scrolling, the right button is too soft. If there is a good mouse nearby for comparison, then the work of both the left and right buttons and pressing the wheel causes some bewilderment. If in general, minus the shortcomings, then the implementation of the trackball itself is still excellent. You will have to clean it quite often, there is no escape from this with such a design. I worked from my own battery for 8-9 months, 2-10 hours a day, quite a result a year later, a noticeable premature wear of the micros under the buttons appears, such as there are clicks, but there is no pressing, or vice versa, which is not a result at all.
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