If you have a number of guitars that you really like to play, and you are tired of getting to one of them with the strings a bit weathered, don't waste any more time or money. Buy these Elixir strings and enjoy picking that guitar up again and again... even if you don't play it for a few months! I'm not remotely exaggerating. These strings last and last - especially when used with a GHS String Cloth. I have a habit of washing my hands in warm water, (an Allan Holdsworth trick), before pickup up my guitar, so my hands are generally clean anyway. But that, along with the cloth, and these sound great for a LONG time. The last set I had on my Strat lasted almost 12 months without much fidelity loss. The acoustics life is a bit shorter... but not by much. My Taylor 414ce currently has the Elixir Custom Lights installed. It's been a little over 5 months with very little difference in tone. And I live near the ocean. Any of you who live in similar conditions know how corrosive the ocean air can be. Try them. You won't be disappointed. I've tried other strings with similar claims. Cleartone, DR, Etc. And if you used D'Addario EXP strings, they are very similar and a bit less expensive. But the Elixir Nanos are the bomb!! Enjoy!!