Opinions wanted on tire monitors

After a blow out on a previous TT and considering the damage it caused I purchased a Tire Traker Tire Pressure Monitor system for my new trailers four tires. One trip to Canada from So. California and back sold me. The little added stress of not knowing how the tires were doing since one cannot see the rear two tires was eliminated. A quick press of the in cab monitor button and I could read each tires pressure. I was alerted only once when a tire went below the threshold for the plus and minus allowed from the set pressure. I did in fact have a small tack in the tire which was fixed at a convenient tire shop later in the day. A second trip to New Hampshire a year later, I found that due to some erroneous readings I needed to replace the battery in the each of the sensors. Also desert heat had deteriorated the "O" Ring seals and I replaced them. Our 8000 mile trip went like a champ and the tire pressures were monitored continuously. I will not be without them again.