We have the TST 507 system with the color monitor. While the system is not cheap, it does work as advertised. Two weeks ago we were coming thru Tennessee on our way to Virginia and I noticed the pressure on one of our tires slowly dropping. When we woke up the next morning and turned the system on the same tire was ULL (greater than 10% less than the tire manufacturers specified PSI) and the alarm went off. I remembered hitting something in the road the previous day and sure enough it caused a slow leak. Replaced the tire and we were on our way. I am sure any TPMS system would do this but I got the TST system as a result of the great reviews.
Stu & Nina Stoner
Central PA (Lewisberry)
2017 Jayco Alante 26X
2018 Thor Four Winds 24F (traded)
2016 Forest River 22RR (traded)
2008 Honda Gold Wing Level 3
1968 Honda CT90 Trailbike