Martin Strings, like most of the strings we carry, sound great. Most varieties sound as good as—or even better than—D'Addarios, the industry standard for great string tone. But what sets them apart from all the other good-sounding strings out there is this: They simply don't break. Martin gives a technical explanation of this on their website, and there's a reference somewhere to lots of research and collaboration with specialty steel producers. But the real test is on stage. And whenever I run across a worship leader or other stage player who used to break a lot of strings, they now swear by Martins. And the endorsement of actual working musicians is always worth a lot more in my eyes than celebrity endorsements.