You will discover that, depending on the knot you use, the knottable wire doesn't cinch quite as tightly as mono. Close inspection will reveal slight gaps between drawn-down wraps. Still, said wires do hold well under pressure, if the knot is tied correctly. In fact, one manufacturer, Aquateko, maker of Knot2Kinky nickel-titanium (NiTi) leader wire, notes that very fact on the packaging of both its single-strand and 7-strand products. Thus far, I've tested the material with Spanish mackerel, and found the knot strength to be very good with a clinch, improved clinch, uni-knot, Albright Special, Homer Rhodes loop, and others.