Strongly summed up the reliability of the wheel. Minus an excellent and not cheap mouse. There were different mice (including cheap ones). None of them broke in such a long time. Has pros: Response speed, ergonomics, weight, the presence of its own USB connector, amazing autonomy with two AA elements. Its cons: The wheel broke after about a year and a half. Now it lies in a long box and is waiting for repairs, which are by no means cheap.