On both my Martin 00016 and my M. Suzuki, Elixir Nanowebs gave the sound equivalent of an 'upgrade'. Fantastic sound, longevity and lack of squeak. BUT the 3rds kept breaking. On the Martin, I changed from 12's to 11's and haven't broken a 3rd since. I tried Polywebs and hated them. A friend tried Nanowebs on his Gibson J200 and they didn't sound anything like mine, so maybe they suit some guitars and not others. To me, they are the best strings around, and have often drawn the same kind of ' wow! what strings do you use?' comments others have reported. But breaking 3rds ARE a problem, and Elixir need to address this.