LOTS of guys here in Utah swear by it, as well as the Pro-Cure brand. They use it for walleye, channel cats, kokanee salmon, trout, striped bass and wipers...almost everything. Pick the flavor that seems best for a given species and have at it. Crawdad works on most fish species here.
(It is VERY sticky and smelly. Avoid getting on your fingers if possible - especially if you snack while fishing! Keep some cotton swabs in a baggie to apply it. And the only thing that seems to remove it from lures afterwards is WD-40.)
