A good TPMS is worth it's weight In gold. I use one in my RV that tells me the tire pressure and temps, and here's the perfect example why:
Last April my 10-year-old TPMS system failed in the middle of a trip to Moab, so I went back to checking the tire pressure manually each morning. I had a set of 6 new tires on the bus that were less than 6 months old, so I wasn't too concerned, but I am diligent about checking the rig out every morning before we roll out.
On the way back to California, I had a valve stem fail on my driver-side inner dual. Without the TPMS system, I didn't know it was going down until it was too late. The blowout and roadside repair cost me more than the new TPMS system that replaced the old one.
If the TPMS system had been functioning that day, I'd have receiver a low pressure warning before it blew out, and could have stopped, avoided the roadside repair costs, and possibly saved the tire. Instead, I sat on the side of the road for 5 hours in St. George, Utah waiting for the truck tire service.
2006 Black Unlimited 6-speed, Rubicon Express 5.5" Long Arm Kit