I had Pressure Pro installed in the Southeast FMCA Rally in Brooksville, FL in Feb., 2008. I believe it was around $600. I had them installed on my 05" discovery and my toad. I got them because I hated the constant checking of tire pressure. Now before I leave on a trip I just push the button and the individual tire pressure shows up. I also have my wife check them going down the road, especially in the Summer. I have checked the pressures twice by hand and the Pressure Pro was within 2 lbs. I had two blowouts in my previous coach and enjoy the ease and peace of mind of the Pressure Pro. I would recommend them.
Bob Beyer, F353488
2005 Discovery
2004 Saturn Vue