Opinions wanted on tire monitors

I've been using the Tire Traker tire monitoring system on the four wheels of our 26 foot travel trailer for two trips, one 5500 miles and the second 7600 miles and one year apart. Two things I found was that the 1632 batteries need to be changed each year and the cost of those batteries is super high if purchased at Home Depot (as an example) and cheaper if you get them Techno RV. The second item is the O-Rings on the sensors that screw onto the tire valve stem. My latest trip had the system working OK but the monitor kept indicating that a sensors had problem's. It turned out to be old cracked O-Ring seals. After I replaced the seals with ones I purchased at a hardware store, the sensors worked great for the last 4000 miles of our trip across country. So keep in mind Batteries and O-ring seals.