DD has had issues with F20 and F21 30 -11 bats cracking, though in fairness, both were used against dimpled balls. Had replacements in hand within a week. Was told they only replace once. The second time they replaced as a courtesy (broke only after two uses), but was told they wouldn't replace anymore. For the second replacement, we changed to a 30 -10 and it's holding up pretty well so far, but is also no longer being used with dimpled balls.