I use these on an ESP LTD V-300. Never had problems while tuning a half step down from standard, and there's enough tension that you can tune down a step or two and still be fine. I've been using these strings for a few years now, and don't see using anything else. Be sure to register for the Player's Circle as well, as you can get free* swag for the codes on the inner protective pack! *You do have to buy the strings first.