We have had ours for a year and 1/2 or so, and about 15k miles. The first set of sensors was from Saftee and they were short threaded and soft metal and stripped easily if you tried to tighten a leaker. TST replaced the whole set when they became the new distributor, that was almost a year ago and they have all worked fine. I did go to metal stems on the toad as Centrifigual force nearly pulled out a rubber one, and I was not going to give it a second chance. Once in a while it will drop the left rear toad tire, so I am planning to buy the repeater, otherwise the system has worked very well.
Have a great day Happy Trails Bert
2006 Monaco Dynasty Diamond IV 42' Tag, ISL 400, Residential Refrig, 10KW Onan, Bosch Washer/220V Dryer (previously 2003 American Tradition 40W)