How do you know when you have a bad Le pro--load the cue ball up with english and try to reach out and touch that object ball--when your through there's a big chunk of tip missing from the whole tip that once was on your cue--this is the very same thing that happened to the Champion tips in the early 80's--consistinecy went south...super soft k tips work fine for this old timer now--I would like to try the Mild Duds though--just to check em out--heard that they are the real deal