Only problem we have had is that after 20 plays they were rusted out. Good ole Stern balls, always have to replace them, wish they would find another supplier for them.
Quoted from LOTR_breath:Sorry if this has already been discussed. Anyone having problems with magnetized balls? We held a launch party this weekend with two brand new TMNT pro's. By the end, both machines balls were magnetized. One was worse than the other. These were with the factory balls. Thanks.