Never shot them but the following lines don' t fill me with confidence in the people who are promoting them:>>>>>>(ABSOLUTELY NO TUNING REQUIRED! Simply screw on and hunt!)<<<<<<What idiot gives someone advice like that? No one should hunt with an untuned bow regardless of what type head you are using. And then there' s this line>>>>>>(Wound will not close or clot.)<<<<<<<How the hell can they promise that? Are they coating the blades with an anticoagulant chemical? Do the blades leave retracter clips in the wound channel to prevent closure? Smells like BS to me.