I have a TST system also. I had one on my last coach and I wouldn't drive one without it. I sold the coach with the TPMS on it and bought a new one before I even got my new Challenger. Let me tell you why. I was driving down the highway in the old coach when my TPMS starting screaming at me. It cycled around to the offending tire and it was at 198į! We pulled over to look at it then limped to a truck stop. I had to move the coach and lo, no brakes!
I could only imagine what would have happened if not warned. At least a tire going flat might give some warning, but a over-heated one? Turned out one of the calipers were dragging on the wheel and eventually boiled the brake fluid! GET A TPMS! It probably saved our lives.