About 2 years to complete and the mouse is still working great. I have used it in gaming as well which i though this mouse will not be able to bear. But, it did well and it still working great. If u want to buy a mouse with can bear the pass of time, u can buy this one. The price is complete justified. Its very comfy to hold for long periods. Only thing lacking is a dpi control which i really cannot expect in a mouse of this range.