God bless the MD 11
The MD 11 that KLM uses on the AMS - ACC - AMS route is a beautiful aircraft. Have flown that leg at least once every three months for the last two years now. Great crew on board and very attentive service too. You should not be having any complaints on this flight - except maybe delayed baggage in ACC (happens once in a while).
I particularly prefer this route because i have been upgarded to bus from eco on at least one out of every three legs flown - even when i was silver.
Also, another quirk for this route - in case of an overbooking in eco and seat availability in business class - they sometimes convert rows 4-7 into eco class. Which means that while the meal options are eco class meals, you still get that very comfy WBC seat to sleep in - which is great on the night leg from ACC to AMS but not so useful on the AMS - ACC flight.
A word of advice - please do have someone to meet you at ACC airport and in case you plan to take a taxi, ensure that you firm up the rates well in advance.