I have it in my tires and plan to do a puncture test soon at my upcoming tire change. I'll do the drill test along with riding over a board with a nail or two protruding. My guess, it will spray the shit all over the place. But, it does a great job balancing the wheels!
I have had nails and staples in previous tires, and as long as they are in the tire, it never lost pressure (before I started using ride on).
Based on the results of my puncture test, I may go to airsoft pellets. I believe the larger diameter pellets (and lower cost) will do a better job of balancing and distributing themselves than the dynabeads. Actually, dyna beads come in a variety of sizes.... the larger ones go in during tire mounting, while I believe the smaller (and IMO, less effective) beads were a concession for those who wanted to add to an already mounted tire.
2011 Silver/black Vision, Ness Big Honkers, Ness Twin Sucker, PC-V w/AT, Lloydz VM1-DR cams, Lloydz Adj Intake, Lloydz Variable Timing Wheel.
2006 110" (133hp/142tq) +nitrous Kingpin (sold)