Ahhhh hah, someone is aware. Vanish is great line if you use it for the right purpose. I will say, it is not real shock resistant. However it is great line for drop shotting and flick shake's, dart heads, any thing that a reel set is all you need. Its not my favorite line, but it is not a bad line at all.
To the other poster, if your buddy's knots are not holding its because he is not tying it properly. Ive used it on shakey heads and drop shots for years with no problem at all. It can certainly be used on cranks and rip baits, but its not my choice.