Living in Nijmegen about halfway in between Düsseldorf and Amsterdam I make sure I depart from here whenever flying on a proper airline. Düsseldorf is a breeze compared to it's bigger sibling 200 kms northwest. Airside facilities are a wee bit sparse but in return it's quiet efficient fast and has friendly staff that knows what they're there for. In my opinion those are the things that make an airport deserve a high star rating. No machine-gun toting military police present like in AMS and on the way back from Miami last year I went from jetway to S-bahn in nine minutes on a flight coming from ATL. Try that in AMS you'll still be waiting in security by the time I'm drinking a cold one at home.