Used on a 25.5" scale length Matsumoku built humbucker equipped guitar. Noticeably faster at settling down following installation and a quick (manual) stretch. They also seem a little less bright initially than my usual choice, Daddario exl115's. As far as the manufacturers claims of improved tone and output go, I couldn't say I have noticed any difference, but I get plenty enough output from my amps already! A little expensive, but they do last well. Overall, the best strings I have used, mainly because of the fast bedding in time.