I will start by asking, are you fishing stained water, weedy lakes, are you targeting weedy banks. If you are, I would not bother with the leader. If your fishing faster reaction baits, I would not bother. If you were in rocky, weed free mountain lakes, with gin clear water, a leader might make a difference. I have used them years ago but I hate tying them, and then dealing with the knot. The one weakest part of the system is the knot. When the leader gets frayed you often have to redo the entire leader or deal with a shorter version. Not worth the trouble, but its all up to the user. I know people that love them, and use them all the time. It's just not for me, especially in the waters I fish. I do love fishing 100% floro for all my plastic baits and often fish them slow and deep. So fish detecting the line is never a problem.