Crazy addicted pin trader here!!!
I know I'm going to be perceived as a Negative Nellie here, but this is my honest opinion. While I did make a few cool trades onboard, I did not find the selection of CMs wearing lanyards to be very plentiful compared to the amount of CMs wearing them in WDW. At times I was very hard pressed to find a CM wearing a lanyard. Remember that the Gift shops are only open when you are at sea. More often than not, the CMs at Guest services did not have lanyards. the pin trading hour IMO was pretty bad and not worth the advertising. The highlight was pin trading w/ the ship's officers. Now that was cool, but if only you could get those poor men to smile. Many of them had that 'deer in the headlights' look and that given the chance, they wouldn't walk but run from this task. The CM who coordinated this event on our cruise told me that she does have a difficult time getting some of the officers to participate. Many don't deal w/ the passengers in their day to day jobs (therefore they don't feel comfortable, CM said this) and many don't want to have to don their dress uniform.
She said some of the officers have to be called to be reminded 3 or 4 times prior to trading time. She was also telling me of the 'unique' excuses she heard from them as to why they didn't think they were going to be able to make it that evening.
Yes, there were a few of them who seemed to enjoy it and a couple who tolerated it. But I can vividly remember the look on one officer's face and I told the CM that she'd better chain him to something or he was going to bolt when she turned her head. She laughed at my comment and appearantly he was one of the ones w/ the excuses and always required several reminder phone calls.
I'm not saying don't trade, just don't expect it to be as popular as WDW.
BTW, I wanted to go to the trading w/ the ship's officers so bad, I left the dinner table to go trade right at 7 pm (the beginning of it for our cruise) so I wouldn't lose out on all the good trades.