I think the biggest issue of concern is how it was designed to operate. We all know they monitor pressures and temperatures, but the functionality of the display is what really will tie it all up as a decent product. I have had three systems in 10 years. Pressures were never the same as the hand held gauge with any of them, they were all off 1-3 PSI, was it the gauge or the TPMS? Who knows.... The Pressure Pro and EEZ Tire displays were simple and common sense was applied when designed, not