How many of you guys have or do not have a TPMS?

Just got a TireMinder TPMS for Christmas per my request. I was always checking my mirrors to see if the TT's tires looked ok. The fear of driving along not knowing if a blown tire was tearing apart the side of my trailer was my main concern. I would assume if I had a dragging brake shoe or a bearing going bad it might also raise the tire temp up and alert me of a potential problem also.