I just received one of these yesterday and intend to try it with several shotguns and various turkey shells.
I'll put it together and bolt it to my bench as soon as the weather allows. It also has the "Hydraulic Trigger Release" which looks like a very nice feature.
This is an interesting product that differs from some other types of rests on the market due to its use of 3 different nitrogen filled "shot dampers".
This product is supposed to allow a shooter to pattern guns, up to a .415 Rigby or .50 BMG without damage to the gun or to your shoulder.
With all of the interest in the effects of recoil, I thought I'd give this one a try.