I purchased it to replace the clumsy Razer Naga 2022, and after using it for a week, I figured out how to clean the contacts on the clickers of both the Razer and the A4tech X7 755. In conclusion, the older model of the X7 is preferable since it clicks less noisily, the buttons can be hit with less force, and it has a better overall feel in the hand. PS After using it for a half year, the hand became accustomed to it, but in general everything stayed the same as it was stated above. If it weren't for the design that fits perfectly into the Aerocool Mechatron BE case, it would return the old X7. The issue known as "freezing the mouse" is still there, and in certain cases, you need to reconnect it in order to get rid of the multiple clicks that are generated by the software component.