if there is physical resistance while pulling the trigger, it very likely works. its one of the products that actually does what its supposed to.
the best time to use it is when you remove an LP fro the platter, hold the disc with your middle finger in the hole (shut up!) and your thumb at the edge. from about 10" away, aimed at the center of the record, slowly squeeze the trigger in. then aim the gun away from the record and release it (slowly so as not to damage the crystal inside.
now the record wont set in the jacket attracting dust into the grooves. sometimes when the air is dry, you may need to zstat the record before play, but thats usually not necessary.
some people use them on CDs but i dont see the benefit.
another thing it does nicely but which i dont permit is to shoot it at a womans or girls hair when it is all staticy. from the raised position of the hair when charged from brushing, the zstat just COLLAPSES the field and the hair relaxes. its dramatic. but then youll have to hunt for the gun and they seem to think of it as a novelty.