The first gen. of Cyclops had some issues but this was corrected and they were fine after that. Look at rexus' specs if you doubt it. D'sphere's are as well made as any ball out there. As stated earlier the reason Diamond switched balls is because Cyclop went away when the parent company hooked up with GDM to make Dyna's. Had nothing to do with quality issues. I'm not a big 'China guy' either but Dyna makes a great product.