For me, the durability is tension maintenance (even if it isn't what people usually thinks when talking about durability), since I don't break strings. So if I can still talk about it in a month or two, that's fine for me. Mind that I put ElastroCross, so the result might be a bit biased. Especially since it's getting warmer now all of sudden. Don't know if it will last, but for the moment it does. Slight error on the last line of my previous post. The string I didn't hit with is of course the Hexy Fiber, not the Hex Multi.