Up until I found cleartones, I used elixir nanos, and had the fray phenomenon happen every night, causing deadening of tone immediately, forcing changes of strings way too often(gigs 5 nites a week)
Given the price, not worth it. I was changing strings twice a week. (ouch)
With cleartones, I only had to switch sets once every two weeks. Now that I'm mostly a livingroom player, it's once a month, if that. Now, I understand some(like me) may have more acidity in our sweat causing a breakdown of the elixir coating, and some don't. But if I'm going to pay top $$ for strings, I want them to at least perform as advertised. Hence, cleartones. Problem solved.