Kerry makes some good points. My TST TPMS so far (5 mos old) seems to be working fine. It has the user replaceable batteries so no need to send them in when that time comes. It also has an easy on/off switch that I turn off when camped and turn on when we break camp. That way, by the time we're loaded up ready to go, all transmitters have reported in and readings are available. I did a lot of research and settled on this system due in part to being able to set my own parameters on pressure (+/-) and temperature ranges. Some do, some don't so check that out before spending your hard earned cash. Regarding trailers, I have a 14' Wells Cargo I pull behind my TC and no repeater is needed for that. Also the trailer monitoring is easy to disable if not towing. Hope this helps with your decision as I'm happy with mine and it's been trouble free so far.
