I have used it several times and am about to order it again. Hens are free range and still take it from the hopper, tho I imagine a few local wild birds and pheasants are getting wormed too. Call it my contribution to local wildlife health..
I order it via my local supplier Collessie Feeds (Blacks) and as they've several customers using it there is no additional fee over the bag cost. I keep using it til the 10kg bag is empty, waste not want not.
VermX should be banned, it has no effect on worms or anything else that I can see. Complete snake oil pellets for people who believe slick marketing and implied value with no scientific basis.