These are my favorite strings so far, great sound, durability and strength. Regular strings Ernie Ball are also good, but their durability does not suit me, since I play mostly downstrings, then my sixth string often breaks, I don’t know why, perhaps the problem is in the angle of the brigade or in the string, but this is not important, the important thing is that cobalt strings are much stronger, louder and have a richer sound, when lowering the tuning to drop A, they sound great on the Gibson scale. I will use these strings as long as I have enough money for them, and if I don’t have money for them, then I will save up, because these are the most metal strings ever !!!