I have TST and it works pretty good. Periodically it will drop a sensor. I have the flow through and 2 of them don't - they need to be removed to air up. TST will replace them for free but I haven't felt like pulling them, sending back and re-programming the new ones. All in all I like it. I don't need to manually check the PSI and it offers nice peace of mind. The extra sensors for the toad are a little pricey. Do they really need to be $50 each? $200 just to monitor the toad. All in for MH and toad it's almost $600. No small investment but worth it I guess.
The sensors are a little heavy and they bend my valve extension arms due to the force from spinning. Not a big deal, and I can either blame the sensors or the flimsy valve extender arms.
I had a clearance issue on the front wheels. The flow through are too big to fit through the stock hole in the wheel covers. Being a metal working guy, I worked it out but just an FYI.
BTW do a search on here for TPMS. Lots of threads already on this topic. It comes up about once a month.