To me, it's all the same, if you break it down; yardage is really just numbers we've assigned to distances...and these distances are, through repetitious practice, memorized in our minds (twenty yards to one might be twenty-seven to the next). The difference lies in the fact that some have repetitiously mastered the Zen of knowing the arrow's trajectory by "feeling" it, they can just look and know. This is (my opinion) one of the lines of separation between old-school trad and wheelers. You shoot enough basketballs at a hoop, and you no longer need to pause to judge how to send the ball through the rim...of course, in either case, there's always room for error...many of the animals I've shot at could verify that. The gadget is no substitute for practice.