Steve, here's a link to a previous tpms thread
The Orange system is still working well and I notice that it is now also available at Amazon
. I do have one sensor now that appears to have a dead battery. This is a pain with internal batteries, but it is still the neatest OEM style installation. My local tire dealer happens to sell Orange and so getting a new battery and an installer familiar with the system is not a big deal.
Since upgrading my GPS to a Garmin LMT model, I have found that the live traffic interferes with the tpms signal similarly to the iPod FM transmitter problem I reported earlier. This may be due to a weak tpms signal over the distance to the trailer wheels. I have never had a problem otherwise getting a signal from the trailer into the truck cab. When towing, I now just use the old GPS cable that does not have the traffic receiver built in.