My brother installed it on his bike and it worked pretty well. The theory behind it is it makes the chain pull parallel to the swing arm. So throttle doesn't affect your suspension. Without the amp link when you're on the throttle, the rear suspension tightens up. I can tell a little difference on his bike, but he says it helps a lot. He can get the power to the ground better, and the suspension works better when hammering through the woops.

He is going to pull it off, because he's too worried about the chain coming off that roller, and hitting the case.