For anyone that reads this and is interested. I bought a spool and have been using it, in water with 10’ of clarity the invis-line is pretty visible. It’s fairly white and is easy to see, I’m not sure if it scares the fish or not because I have caught quite a few with it. I always have a fluoro leader though. I think I might take a magic marker to it in a few spots and help break up the whiteness, give it more of a Camo look. I wouldn’t call it a “pos” line like the post above said, but I don’t think it’s worth paying more for it.