After a year of intensive cycling....I finally broke down and decided to learn how to patch a tube instead of just tossing it and installing a new one. Did my second one tonight and it seems to be working just fine. The first one is in the rear wheel of my Bianchi roadie and has a over one hundred miles on it since the repair. I guess that means I am living proof that anyone can learn to patch a tube with success! I don't know how long to expect these tubes to hold out...but I figure I can always patch again or go back to a new tube. How many of you have never used that patch kit?