In general, the deficiencies could be tolerated if it weren't for the deterioration occurring within such a short period of time. A mouse that costs between 7-8k ought to be able to function for a lot longer in my opinion. Based on what I've read in other reviews, it seems that this and other pricey models are prone to the same kinds of malfunctions. Has pros: The body is made of high-quality materials, and it has an attractive and comfortable fit in the hand. Many disadvantages, including: - Software that occasionally glitched and settings that frequently crashed. Because of this, I had no choice but to store everything I needed on the mouse itself and uninstall the software. - Given that the backlight was always kept down, the device did not have the most impressive battery life. - A squeaky wheel that finally gave out after a year and a half and a month of use. Because the guarantee was good for a period of two years, I was able to get my money back.