Just read this article... wish the writers do a complete research before they publish.
For example, the writer says you cannot see the price of an upgrade to Economy Comfort on DL until after you purchase your ticket. That is not correct. DL shows you the price for an Economy Comfort ticket even before you enter your credit card details while making a reservation.
On the other hand, I just love the dedicated cabins for Economy Comfort on the KLM 747s.