If I may add one elements to the above messages, it is this: get yourself a set of noise cancelling headphones. They may a heck of a difference and add to the comfort of the journey. I bought some Audio-Technica for a bit less than US$ 200.- and would not consider flying long-haul without them.

A waste of money to me. I don’t have a problem with noise levels on long-haul flights, but I have a big problem with economy-class seats. 😡