KLM Upgrade Bidding “Upgrade Yourself”

KLM has a “Upgrade Yourself” program, which is a bidding system for upgrades for economy class reservations. Read everything about this KLM upgrade here!
KLM 747 Amsterdam to Tokyo (AMS-NRT) thoughts of a 13 year old.

What is business class like on the upper deck of KLM? The upper deck on KLM is very spacious, has polite staff, and beautiful views.