I shoot split. I have never been comfortable shooting three-under, though I have tried it. If I were to go shoot targets and needed to use a gapping system in order to compete, I would shoot 3-under, but I do just fine without a conscious aiming system out to 25 yards, and it's much simpler. I started shooting trad to get away from all the target shooting, so this works for me. There is no doubt that 3-under is the way to go if you want to compete and shoot good scores. I just don't do that anymore.