Although I've always preferred the dark flake over the green herb, I was inquisitive about these grinders used by the 'buzz heads'. I've been using one for a couple of years now & think they're great. Perfect for plugs, rewarding you with a much different cut, than you'd get from rubbing out by hand. Pictured is Kendal plug which ends up as a fluffy/cube cut sort of thing. Other plugs like Yachtsmans for instance, result in a finer/ shag like cut. I also use the grinder on flakes & rubbed mixtures too, seeing how the difference affects the smoke. Rich Dark Flake by Germains for example,has always been a 'finnicky' flake. After using the grinder on it, I've found it massively improved the burn, taste & overall smoke. I've heard people use food choppers & coffee grinders, which is something I'll have to look into, for now though I'm very happy with the 'ganja grinder'.