I have used Dynaplug once and the plug worked like a charm. Finished my fondo and then continued to ride on the tyre for another 200km. I would pushed it even further but I was starting to get a little paranoid that I was going to get stranded out in the middle of nowhere. When I took the tyre off the plug and Orange Seal had sealed the tyre up nicely. I need not have worried. I have no experience with Stan's.