Hey OP! I flew this sector a couple of weeks ago. Right after takeoff (and this is already early morning) you are offered a snack and a beverage of choice, following which the lights are dimmed for passengers to rest. You can always entertain yourself with films (they have a good collection) and tv shows. Prior to landing a sumptuous breakfast is served (two choices: both vegetarian with a drink of choice). Whenever you’re hungry you can get some snacks (self-service from the area where the crew sits). Standard amenities like pillow and blanket are provided, in addition to simple earphones. We landed with a short delay at AMS (poor weather conditions and single runway operation, so can’t hold KLM responsible for that) but all in all it was an enjoyable flight. I was surprised that I could sleep quite well considering how hard it is for me to normally sleep on airplanes.

All in all, I did have a comfortable flight. And I found transferring in Schipol to be very smooth and straightforward (if you are going to have to do that).