I've done searches and cant really come up with a general consensus of who has the best TPMS on the market these days? This past summer I purchased an InnoTech (for RV's) tire pressure monitoring sys...
When I had my 5er I could disconnect and drive 25 miles home and the monitor in the truck was still showing the last pressures. I found they will display for about 40 minutes after losing signal so I never new if the readings I was looking at were old or new readings. When you disconnect the sensors from the tires the alarm would sound before you get it disconnected so that part works fine.