I've used the 4# & 6# test, over the last two years ... and have found it to be "better" than the XT Solar. The XT was discontinued, and Iron Silk took its place (in the hi-vis green) ..... wonder what they're going to replace the Iron Silk with If they don't come out with a "hi-vis green" replacement line, I may have to look into Ande lines. .... cp