While it’s probably a completely unnecessary feature for someone that’s still playing on a 60hz or 75hz display, this is an absolute necessity for someone with a 100hz+ monitor. Moving the cursor around finally feels as smooth as it should both in-game and for standard use in the desktop environment.
https://www.amazon.com/Razer-DeathAdder-Expert-Professional-Grade-Adjustible/dp/B00AAS888S