Ford has a service bulletin out on the 20 inch chrome clad wheels. I took my car in and complained that I was hearing a rattling sound out of all four wheels. My tech ordered me four new wheels and switched my tires over for nothing.
Unfortunately tonight, about 3 months later, my wife hit a curb while parking and tore up the front passenger side wheel.
I love how they look, but the chrome clad, which allegedly cannot be fixed, is a nightmare once they get scratched.
Also see this thread for info:
http://www.fordedgeforum.com/index.php?/topic/2750-20-wheels/