"A feature-rich budget mouse whose specs promise more than its sensor can deliver."
The 12,800 DPI is a marketing figure achieved by software, not the sensor's physical capability. In your hand, this means sticking to the native 1200-6400 DPI settings will provide more reliable tracking without artificially generated pixels.
This is for someone on a strict budget who wants programmable buttons and RGB lighting for casual gaming or general use. It offers significantly more features than a standard office mouse for a similar price.
Anyone playing competitive FPS games should invest in a mouse with a higher-spec sensor. Users sensitive to build quality or who expect multi-year durability from heavy use will find the materials and components lacking.