Out of the gate it is great product. Comfortable. Secure. Non-metallic so you can go through metal detectors and on planes with no disclosure. The Bad is that they don't last. And in the interim you need to make sure the lotions and lubes you use won't degredate (or break down) the plastic. In time , about a year, the clear plastic on the retaining rings on mine just started to crumble. So if you don't mind an annual investment. Looking for a replacement now.