Ian installed a Kick Eez on a stock he made for my 50 cal muzzleloader; between the stock change and the pad, the gun turned into a pussycat with a 300 grain bullet and 100 grains of Triple 7..
Jason Spencer installed a thick Pachmyer on my Ruger No 1 in 375 H&H Mag and it made a big difference. I shot it standing for a bit just after I bought it and I find shooting it off a bench (same setup for my target/varmint rifle) has less recoil now with the new pad. I was a bit stiff last time I was done with it, but I realized I just fired about 35-40 rounds out of it in 30 minutes.
The Kick Eez has not seen much field use, so I cannot talk about durability, but the Decelerator seems to be holding up well (had it about 3 years), but sticks up a bit on saddle cloth type (waht they used to call the silent material hutning outfits are made out of) camo clothing.