that nobody knows about. I'm using Optima's 24karat gold plated Maxiflex strings on a couple of my electrics, and a set of their nickel flat wounds on another, and one of their gold plated acoustic string sets on my acoustic. All of them are just incredible - both in how they feel and how they sound. And I'm expecting them to last a long time - still new enough with them I can't report on that yet. Even their "cheap" strings are excellent. I just bought my granddaughter a Fender Squier Mini for her guitar lessons, and the strings that came on it were pretty awful - wouldn't stay in tune very well, sounded plinky, etc. - so I bought a set of Optima's non-coated $7.99 electric round wound sets (from stringsbymail.com) and put them on. After just the initial gentle tugging to seat them, they stayed right in tune for a longish session of her playing. Pretty cool. The Optima products have replaced my formerly beloved Thomastik-Infelds on all but one of my guitars, and I'm still using the T-I's on that one mainly because I still have several customized sets of Jazz Bebops I don't want to waste. Give them a try, you might love them.