There is another system that actually sends tire psi to the indicator, I'd trust that before an idiot light that only tells me I have a problem once the tire is down 5psi. These tires need to be monitored for 2psi changes.
OBTW, this is my opinion only and not a product slam. I will probably get the direct reading system installed when I have the tires changed. And at this moment I don't have the info on the system.