This seemed like something a player would invent to use a strength boost to increase production. Proof everything can always be improved. www.geek.com

New axe designs aren't new, and that one looks painful on the wrists with its designed twisting motion on impact. For my money, I'd go with a Chopper 1 for cleverness:
www.chopper1axe.com

My father has an old one; it makes the wood fly apart. instead of transferring the downward kinetic energy into rotational energy, it uses it to push the two sides apart with a pair of levers built into the axe head that push outward when the axe is partway in.