What is the general consensus on them? I have a Sigma by Martin acoustic that sounds pretty good. I haven't really used one specific brand of strings on it since I got it several years ago. I did have one set of coated strings on it that sounded good for nearly a year, but I don't remember which brand they were. I've been using Elixer nanos on it the last couple times I've restrung it, but they don't seem to last any longer than a non-coated string. For the extra 6 bucks a set that I'm paying for them, I can't seem to justify it since I could buy 2 sets of non-coated strings and they would probably last just as long.