On my 870 super mag the Lmbsaver pad reduces recoil a lot more than the supercell pad. I too had issues with the R3 pads going sticky. Limbsavers will replace the R3 pads. Same pad as the R3 just not labeled as such. As for the durability of the supercell pad I have one on a different 870. Well one fall turkey season and now this spring season and the edges are starting to breakdown.
