I ilke both. If youshoot them through the lungs they should die quick either way. I like mechanicals b/c of the big holes and b/c they are more forgiving of my mistakes. I am not always shooting from the same postion that I am in practice, while I am hunting, and sometimes I probably grip the handle a little too tight when the adrenaline is flowing and I may cant the bow a little on an angled shot from the tree or the wind may be gusty and I simply feel like the mechanicals is more forgiving in those situations and therefore give my the greatest oppurtunity to make a quick clean kill. For others that are naturally great shots, or have naturally great form, or have the natural ability to stay completely calm, this may not be the case. But for me, I am none of the things listed above, though my composure has come along way, so I feel like the mechanical is the best option for me. That coupled with the fact that I have killed quite a few deer with them gives me a great deal of confidence in them and IMO the best ting you can carry to the woods or the water with you isconfidence.