I've been using it to jazz my baits up this season, after ages when I haven't bothered with things like oils, flavourings etc.
Some reckon they give you an edge. What I noticed was most of your hard-earned floats away in a great big slick.
This stuff is made of fish essence - not oils diluted with other oils that end up smelling nothing like fish.
If all else fails, it seriously sexes up a pot noodle. Even if it makes your rucker smell like a Sumo wrestler's jockstrap if you don't put the top back on the bottle securely.