I've been on KLM 12 times and it is wonderful. Even in economy. You will never see any bad flight attendants. Very good movies and in the KLM book ( in front of you in the chair), it will keep you up-to-date on all info. about KLM. The screen is never blank. It's either showing a movie ( 2 on your flight ). If it is not movie time, there will be a map, or advertising.
There is about 12 channels of music you can hear from.
You'll never get bored and if you're lucky, you might get ice cream on board!