ok this thing is cool, i have large fingers and some fishing knots are just so difficult to tie. this tool really helps me out and makes things alot simpler, and i could never really tie a nail knot correctly, i can now. i ordered two so i have an extra or a loaner for a friend to use. it also helps save line since i dont have to make such large loops and have extra line to manipulate a knot. this thing works and is really cool
I bought two of these to tie flouro leaders on my braided spinning rigs as well as tying tippets together. It works great once you get used to it and saves a lot of fussy fingerwork with loops that you generally need a third hand to easily manage. Definitely recommend if you are frequently tying lines together. You do have to be careful on thin tippet/flouro though as I have had it cut through the line a few times.