I am a guitar player who sweats a LOT, and as such, by the end of a show, no matter how much i clean my guitar, the strings are already starting to feel oxidized, and dirty... so i started using D'Addario Pure Nickel, cause they sound warmer, have a little more tension, and last longer! I was really happy with them, but i've always been a ernie ball fan, so i had to try those. They were dead by the end of the first gig i did with them, wich is even less time than the regular slinkys used to last!!
Maybe i had a bad set and they are better than that... I don't know, but the experience i had was not so good. I'll stick to the D'Addario Pure Nickels.