I have the Tire Minder for my truck and trailer. It works as well as the others based on reviews I received from friends that have the other systems.
The positives of this system: The screen is larger than most, which I like since at a glance I can see the status of the tire. I can see all tires on one screen; I do not have to scroll. It monitors the air pressure and heat for each tire. The company stands behind their product. I receive a new monitor when the company upgraded the system, and I receive new sensors when others have become problematic and both were replaced at no cost to me. I get new batteries at no cost to me when I visit the vendor at the Quartzsite Show - I try to hit this Rally yearly. By and large, the alerts are spot on but there have been a few false reports.
The downside of the system. Screen is larger than most and may take time to get used to. Batteries in the sensors must be kept on hand and changed out at least once a year. Tire sensors have failed in the past due to welds within breaking; each and every failed sensor has been replaced at no cost to me. I carry extras to ensure I have constant monitoring of my tires when one does fail and replace it when time or opportunities permit.
Neutral comment about the system. Depending upon the length of the trailer, you will need to install an extender. If I recall correctly, my system came with the extender, and it was easy to install!