Kamui chalk version 1.21 is awesome!
Disclaimer: I am not getting anything for my review except the one piece of chalk they sent me in the mail.
Review: The best chalk just got better. Worth the price if you value your game. It feels right going on, and the hit is better, with or without extreme english. It all comes down to being able to deliver a confident stroke when you need it. That's priceless. You could use cheaper chalk, but why?