When we first got our unit I read a lot on other forums and only read positive things about the system (Pressure Pro). I read you could find the slow leak and the blow out in the matter of seconds. Plus I know the DW wold feel safer and have something to do while I was driving. So to the question is I love it and use it on all the tires even the spares. I do check the tires on the ground before we leave and use the monitor system as a back up but it is a pain to drop the spare to check so the monitor works there. I have had some false readings but only the loss of the signal of the sending unit to the receiver in the cab. (this gives you a - - and not a 00 or what ever the pressure might be indication) I have velcro on the back of the monitor and stick it to the dash cover and works great.
The short of is I have it, use it, and feel more safer with it. It cost some $$$$$ but I feel if I would see a problem before a blow out due to a pressure problem and it a peace of mind.
George and Debi
2006 F250 PSD, 2005 PF30CK