We're using this one: https://www.amazon.com/EEZTire-TPMS-...9720661&sr=8-1
for our bus and towed vehicle. We've only used it on a few trips and only for the past month, but it got good reviews on the various RV forums.
Sometimes it loses connection to a tire or 2 on our towed vehicle, but it's only for a few minutes then it finds it again. It's nice having the peace of mind. I'm not 100% sure what my tires should be at, but I keep them at around 105-ish and the TPMS has no problem with that pressure.