Strangely, this is one area where CO has not trimmed the fat leading me to believe that they serve in other capacities behind the scenes that we the pax have no idea about.
While I have never found the service of any use other than to request a shower upon arrival (sometimes works and sometimes does not), I imagine that they do something to justify their jobs(or I hope that they do).
Overseas they are generally good to excellent and seemingly want to be as helpful as possible as evidenced by personal experience and others post on this thread.
Dan