I think Future Cruise sales is a great idea. There is nothing to download, when you are buying your $250 credit, $100 OBC is applied to your current cruise the same day. I had twice already on Norwegian Epic and had no problems at all. Then, when I was booking my cruise I just mentioned to the cruise agent that I have future cruise credit, and she was able to find it easily by my Lattitude number. The best thing it is combinable with two other OBCs from the travel agencies.