I have never bought large gift certificates before, but this looks like a great deal. I would like to buy one $500 card to put on my account (mostly to pay crew gratuities). That sounds pretty easy to do on board, or possibly through my TA. Next, I have a second cruise booked with final payment due in September. Since I owe more than $5k, it sounds like I will have to buy 5 gift cards in July, August, and September. I can use these to make final payment through my TA also? Thanks for the explicit instructions.