I was, and still am, a die-hard Dura user, however, the Core ball is growing on me day by day. Though it plays a smidge 'slower' than the Dura, the Core does have multiple other benefits that outweigh a tad slower pace of the ball.
1. It doesn't go out of round, and plays true for a long time.
2. it doesn't break as fast as the Dura does; it outlasts the Dura 5-1
3. it is still way faster than both the Selkirk Pro S1, and the Franklin x40 by a large margin,
4. It plays very consistent, and has virtually no 'random' bounces as both Dura and the Vulcan do!
12 CORE Pickleballs