These new balls are totally awesome! When I started golfing only 6 years ago, I used the Nike PD Soft series ball; that ball is fine for lower swing speeds.However, after getting my swing speed above 90 mph (avg now is 104mph), I switched to the Nike 20XI.These balls fly like birds of prey when they come off your clubs; straight and cutting through any wind. With wedges to the greens I've spun them back up to 12'. Even with my longer irons and hybrids I can stop these balls on the greens.As a test, I bought a sleeve of Titlist ProV1 balls. They were good, but in my opinion, and for my game, the Nike 20XI was the winner.I also love the feel and the sound as they come off my irons and can immediately tell by the feel and sound if I've hit it stiff.I will absolutely NEVER play any ball but the Nike 20XI unless they come out with a better version of it.