Been using for over a year with no problems. Bluetrack works well on different surfaces. The grip of the mouse is comfortable, thanks to the rubberized sides. However, when working for a long time, the hand gets a little tired, the mouse is under a small palm. The mouse is rather for mobile use, take it with you with a laptop. Switched to logitech m510 at home. Summarizing what has been said - an excellent quality mouse for not long-term work.
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