Originally Posted by Doubles
It's not about the wear and tear on your strings. Its the fact that polyester has terrible tension maintenance. If you use it because it takes 20+ hours for you to break the string, then you're using it for the wrong reason.
I use it because it is durable and I hit harder and with more spin than non-poly strings. I try to not break my strings. If they get loose I couldn't care less, I can't afford to be restringing my racket every week, or even every month.