I like 2 piece balls and like LM as well. Really like my World Class. That said the marketing on this line (filler or not) well just not a huge fan lets say. It's like DV8 on steroids. Usually I say don't care what ball looks like but hard to see myself ever owning this ball with its little ball cap and gold chain and all but hey if the kids love it so be it. Shame because ball has a nice motion.