In general, I was flattered by the price. The ergonomics are generally not bad, but alas, the workmanship is not at a very high level. Different pros: Price. Nice appearance. Good sensor. In a small hand it will lie well. Quiet click. Cons below: The right key broke very quickly - about 3-4 months. The side keys are small and inconveniently located. Firmware is sold separately, without it, fine-tuning this mouse as a gaming mouse is impossible.