You know it's such a great feeling when I can get up, walk out the door, walk around the car and go to work without worrying about a nail I don't know I could pick up the phone yesterday or the day before. Also, I'm happy to see that my tires are holding air. No slow leaks. The only thing to keep in mind is the tightening process when sealing the sensor onto its O-ring. Be sure to hold the rubber valve stem, especially the old one, well with a tool and washers that don't cut through the stem, otherwise the stem may rotate and spring back into the slot in the rim when tightened. Lick, albeit slowly. Learn from my experience.