From Plugged In Golf: "The powerful feeling of the Mitsubishi Kai’li Red translated to the numbers in the form of outstanding ball speed. I never take a 1.5 smash factor for granted, but I got close because the Kai’li Red was so routinely punishing the golf ball. If you’re looking for a shaft that can give your speed a little boost, this is definitely worth a few swings." Click here to read full review.