Paintless dent removers?

Anyone tried those paintless dent removal tools from Pep Boys? Some idiot put a nickel sized ding on my passenger side door, and a body shop will charge an arm, a leg, and my left nut to get it fixed. A "professional" paintless dent removal guy is charging $140 to do it.

Any thoughts?

its really not something you can just buy a pick and straighten it out without any experiance. it takes a lot talent to do it. but if you have faith in yourself than give it a try.