It's got this very delicate and percussive sound for solos and rhythm alike and gives you a very firm bass tone.
I've read in a magazine that Martins are the only strings Clapton uses on his acoustic and being an avid follower of Clapton, that gave me more reasons to be loyal to these strings.
Recently I bought a pack of D'Addario light strings and am regreting for it, it sounds too metalic for me. I can't wait to change'em back to Martins.
