I am a first-time buyer of Core balls, I was told a few years ago that Core balls wont crack, not sure why I waited so long. Players comments where they are bouncy and have a very slick surface. After playing for about an hour the slick shinney surface was gone and they bounced as good as any other new ball and maintained a true roundness. So, I would say there is a little break-in period. I was going through 3 balls a week playing with another brand (I will call it brand X). It's only been three days of playing but so far, they are holding up. I will know more in a few weeks.
6 CORE Pickleballs