The ad copy suggests you cannot see the end of the fiber optic unless you have your head in the correct position on the stock. It doesn't work that way. You could have your head completely off the stock and still see the glowing end of the fiber. You could put the red dot on a target and shoot completely over it.
It does help with cross-dominance, though. My glasses and contact correct my eyes to almost the same acuity. Without the Easyhit I have a problem with my eyes fighting for dominance and resulting double-vision of the barrel. With the Easyhit there is no problem. That alone is worth the price.
