I tried to get inside twice to check the pressure. I have TPMS but want to make sure the system is working properly and all tires will need air at some point. I decided to make my life easier by reducing the rotating mass of my sensors on the valve stems. The hoses and elbows in this kit have a premium feel. The system in the photos has been installed for about 2 months with no leaks. The included mounts are too bulky and flimsy at the same time. You should be aware that brackets will not work on alloy wheels. "Knitting needles" are too thick for staples. They run on steel wheels. My Chevy has steel rims on the inside and aluminum rims on the outside. If you use brackets on steel wheels, they are heavy enough to justify balancing. They are definitely heavier than most wheel weights. The little piece of metal holding the hoses isn't quite as secure and I expect the hose to come out at some point. I would use a small screed if using braces. Anyway, I wanted to move my stems closer to the center, so I made some clamps. A bit of work, but I'm happy with the result. The hose and elbow lengths in this kit allow this design to work great. Overall I recommend the kit but wanted you all to know what you are getting for your money.