Originally Posted by
millionmiler
I always prefer the lower deck as the overhead bins are larger.
That is a good point - if you have carry-ons that are close to the size limit then they won't be stowable upstairs: the crew will stow them downstairs for you.
From
http://www.cathaypacific.com/cpa/en_...ageinformation
For added safety and convenience to you and our cabin crew, all travellers seated on the upper deck of our B747s are required to make use of the overhead lockers and side-wall compartments to store your luggage. We apologise the upper cloakroom is no longer available for use due to new, improved safety measures.