Poor mechanical design and quality. Never purchasing Corsair mouse again.
I expected so much more from a company with a reputation like Corsair's, but this product has completely let me down. Logitech makes much more solid and reliable mice, 25+ years of use with their products has proven this to me. I will not be purchasing Corsair peripherals in the future.
Nice-looking cord with braided fabric cover (but still too stiff), RGB LED lighting, if you're into that sort of thing; Large anti-friction pads
The overall construction quality is very poor, made of thin, cheap plastic all around; The scroll wheel's axle broke less than 4 months after purchase because it was so thin and only supported on one side; I had to machine a new axle from brass to repair it.