I have a Pro Hunter. The first several times I used it I had a hard time with it. Either it didn't push on far enough or the clip didn't hook. Finally one day while cleaning it I forced myself to sit down and play around with it. Now I can get it on the plug, pull the plug out and put it back in almost without thinking about it. Still fumble with it once in awhile, but it's still easier/faster than a standard plug.

Don't have any issues with mine. Put the wrench on it and zip it out.