Testing and time will tell. I to started out with traditional. And you guys are correct. There is no substitute for practice. But I like trying something new. The concept is simple. Based on a ratio
1/distance x the height of the object. It does not hurt to try something new. I do know there variables . For example the length of your arm can change the focal point. The forest were I hunt plays tricks on depth perception. You all know 5 to 10 yards makes a difference. I to believe in practicing at different lengths and up and down. Let's see how the testing works before throwing it a side. I would first practice using it to judge distance. Then confirm with the range finder. Then once confirmed. Put the range finder away and try shooting arrows and see if works. The investment & time is cheap.