I agree Bob, the Draw/letdown/draw cycle wouldn't be very practical for hunting, but could be useful for target/3-d guys.

For hunting, you'd have to have a system devised that would allow you to take a full draw, and let it down. Then you'd need to be able to hang the bow up with the limbs still squeezed,where you could draw again later, to double the stored energy, and takeyour buck when he walks by.