I was just reading this and thought I would share. Has some interesting ideas and shows the way the "express" places think. I don't think the Express Detailers are bad as long as they are not trying to sell the customer something they are not getting. As long as the customer is clear on what they are paying for I am all for it.
http://www.moderncarcare.com/Articles/641deta1.html
http://www.moderncarcare.com/Articles/641deta1.html