Price tag equivalent to that of a horse for one or two years of keyboard use! After a year and a half of light use, the double clicks finally started happening! I even started using the "up" arrow, which I only used once or twice a month, by doing a double-click on it. The standard motif for a mechanic costing 6k. They still have a mouse model G403, which is a nice mouse; it wasn't until after a year and a half of use that the wheel started to wear out. Logitech engineers are intelligent; they enjoy deceiving customers, circumventing the company, and saying things like "there was a logitech, but it all came out."