So far I am getting 3 bars which is the maximum for a signal. If it becomes a problem I can still move the antenna because 1)it is magnetic and 2) I coiled up all of the excess slack (about 4 feet) in the back of the vehicle and pushed it up in the ceiling liner above the spare tire. I can move the antenna and pull out as much as I need later if I have to.
I actually cut some velcro to mount the little remote to the dash board but when I saw that it fit in the coin slot I thought I would give it a try. If it starts to fall out while driving I will use the velcro. I was thinking of velcoing it to the dash board on the strip between the climate controls and the airride/traction/towing controls.
As far as the coins go, when I get them I actually throw them at people as I pass by them.
(Just Kidding) Actually I put all my accumulated change in the ashtray.
Let me know how your install goes and if you have any other questions feel free to ask. Good Luck with it.