all true...I use NAIL KNOT for everything..I cut the loops of the line...to me it is too bulky to get the knots loops thru the guides when casting...I usually dont have the luxury of false casting and my leaders are sometimes twice the rod length...loops are easier faster to change leaders but I have NEVER changed a leader out while fishing so why set it up that way? to be more exact I have never changed a butt section once it is nail knotted to the line... if you are "dialed in" you dont need to change the leader...for somebody just starting it wont matter either way