i think it makes it easier because you not mentally stressing to get the pin perfect with both eyes open it kind of blurs and for me anyway helps focus on everything else i need to do right with my form. i also shoot really well in low light because of shooting with both eyes open and it seems like you can get used to it so much you dont even look at the pin just focus and the arrow lands where it should. i do however only use one pin out to 40yrds so i think this simplifies things for me to.