So, after a few days of letting the strings settle, I've got to say that I'm not enjoying the Retro light strings on my 812ce 12 fret. To me, the strings just sound dull compared to the standard Elixirs. My teacher, who uses Retros on her all hog Martin OM, likes them better than the Elixirs on my Taylor - so chalk this up to different tastes and ymmv. I will be switching back to Elixir HD lights in a few days.