They do work pretty good, but, I have had them come off. I think it was due to the shrink tubing bumping the rod tip and allowing it to slip a little each time until it finally came off. You might be wise to add one drop of super glue next to the shrink tubing on the loop side which will lock it on. I do not use them at all now. I use the Castwell Knot which has never failed and makes for a lot smaller connection which goes through the rod guides real well.

Hope you have a great Christmas!