I tried this on my Martin 00-15 M. ot a bright guitar to begin with, but I simply enjoy strings with less clangy high end.
These strings, together with Thomastik Infield Plectrums are the best choise fpr this purpose. My strings are relatively new so I don´t know about the longivity. But I don´t really care to be onest. I just enjoy the sound. Makes my steelstring sound halfway between a steelstring and a nylonstring guitar. Perfect for gentle fingerpicking.