I've just recently discovered this line. It has a very small diamiter, much smaller than any fly line backing that I have and smaller also than regular mono.

I'm just wondering if any of you have been using it for backing? I beleive it would be a great idea for heavier lines used for salmon and Steelhead where a lot of backing is required especially when there is limited reel/spool space.

Does anyone see any disadvantages to using this line? I can't think of any.
-Grant