Cruise tidbit from today that I thought was interesting. Apparently non-passenger ships have been using the new locks but Disney Wonder is the first passenger ship to pass through them. The full article, short actually, is from a competing website so didn't add the link. But a quick Google search can get you there if you desire. (The C/C website.)
"(4 p.m. EDT) -- Disney Wonder today became the first passenger vessel to sail through the Panama Canal's new expanded locks, the first of 18 cruise ships scheduled to make the journey during the 2017-2018 season."
Caribbean Princess is scheduled to go through the new locks this year. Couldn't pass through the old ones.
Panama Canal is on my bucket list. Maybe next year. Any Panama Canal transit vets have any input?