Anything mechanical is prone to mechanical failure more than something else which is basically either one piece or welded, glued. I think mechanical broadheads have come into vogue due to industry more than performance enhancement/results in the field. A good archer is going to make the shot, but a mechanical might fail under conditions on failure to deploy and when that happens it will be wounded game. From the studies I have read about them, they seem to be prone to mechanical failure the steeper the angle shot when it connects to the body. So if you're going to use them it might be worth knowing this.