Dyna Beads

Does anyone have experience with this product. The small beads are ceramic and are poured into the tire through the valve stem. They have a real nice web site. Please give me your comments in detail about this curious product. Their site is

http://www.innovativebalancing.com/gallery1.htm

I have seen this product at the SEMA Show (starts this week) and I have experience with liquid sealer/balancers, but not with the beads. I know the liquids work well in larger tires (heavy trucks, for example) and have also had success in automobiles.