Re: Tire Pressure Monitors
Last year, I had manual (external) tire pressure monitoring caps installed. They are simple, and I check the reading at every stop.
At the time, we wanted something other than having to use a tire guage, but did not have time to have another system delivered and installed, nor were we close to a camping world.
They have been on a year, and have been great so far.
The important part of any tpms, is that they be installed correctly.
These have worked so well, I have not pursued installing a more sophisticated tms. However, I am fanatical about checking tires, and will upgrade the tpms I am currently using at some point.
Do a search on several forums, and you can get the good and not so good about each system. There is enough info to read until you need to update the bifocals, assuming you where them.