Sufix Advance?

The lower stretch is real, holds double through the eye uni knots great, and it is tough. Cheap too. Cheap enough to just try it, I think it is a love-it-or-hate-it product. KVD Line & Lure makes a difference on it for sure. 

Seems to sink a little, more like flouro on bottom contact than mono - enough that I won't use it on topwater... but that's an advantage everywhere else. 

I have two big spools of it, although in fairness I mostly use flouro or Armilo these days. But still use it in 20lb on my a-rig/swimbait setup. Like others have mentioned, it is sized like big game, ie oversized, and buying a size or two down is important.

Warning - for whatever reason SDJ knots are absolutely horrible on this line. Baffling, but tested over and over and it just doesn't work at all.