Yes, it does sound like so far, so good.
But did you check the fine print to see if there's any hidden fees? Tough to imagine a company 'footing' the bill for your deposit out of their own pocket for 1-1/2 years and not charging you something for it. Wish someone would give me $500 for 18 months and then let me pay them back $500 without any interest or fees.
Let's see, the facts are; deposit due 11/11/14, final payment due on 11/21/14 - 10 days later, yet the final payment is not due to RCCL until 12/1/14. All this and they're 'loaning' you $500 for 18 months.
Sounds too good to be true, but I wish you luck.