Solid product switched from TireMinder
I had a Tire Minder system which failed after 2 years (screen went blank and it won't connect to one sensor anymore). This system seems more robust. The advantage of the tire minder is you can see all pressures at once. The advantage of the TST is there is a low battery for the sensors which is really nice. Also seeing temp and pressure at the same time is nice.
Make sure you have metal stems. I had a double flat due to valve stems leaking with tire monitors on.