I made the switch about 10 yrs. ago mainly for shooting at game that was moving. Even at a slow walk a person has a tendancy to look at the entire deer when shooting. The 3 under allowed me to keep my arrows in the kill even with a little " big picture" concentration. All of my custom bows are tillered for 3 under. If you happen to be a person that shoots Howatts (Martins) then you' ll find that their tillering seems to fit 3 under better than split finger.