I like EXP 14 Light top/Med bottom on my Taylor 710 , and Martin HD-28. And EXP11 .012-.053 Lights on my GA8, GC6 and Loar LO16. I still have Elxir meds on my Taylor 810. When it's time for a string change I'm going to try the EXP 12 med .013-.056 on my 810. I only use Lighht/meds because of elbow and hand surgery. I like how the EXP's feel, play, and sound.