Tips for Those Using a Resume Service?

hireMePlease asks: 'I am getting ready to re-enter the job market because I work in the 15 hours a day company that was mentioned in an earlier Ask Slashdot. I realize that the job market for us techies is not very good right now(especially where I live in the southeast), so I am trying to find any edge that I may be able to get in order to land another job. My question to the slashdot community is have any of you used one of the many resume services (where you tell them about yourself and they write a resume for you) and were they at all helpful?"