The Uni to Uni is my go-to knot for connecting my main line to a leader. It is a very reliable knot for attaching mono or fluorocarbon to superlines. I routinely use it with 14 to 30 pound braid and 12 to 30 pound fluoro/mono and also 6 to 10 pound Fireline and 8 to 15 pound fluoro. The Uni to Uni Knot is quick, easy, and strong. What else could you ask for?