Well, I just got my 'Jimmi Jammer' I only got one, for the drivers door, that seems the most broken into. I will install it and put the stickers on the window, maybe they will go to the next truck down the line.
You actually need one for each of the doors, this will prevent a screwdriver break-in. I will probably install a current-sensing alarm, might help a little, but that will be the extent of my 'Theft-proofing' as the new Ford keys have the Micro-chip in them.
www.jimmijammer.com/