I wasn't the grand prize winner, but I was a runner up for a REALLY discounted cruise to Bahamas with MSC cruise lines in November!!I think that's still a great win!
I would be skeptical of any cruise line saying you "won" a discounted cruise. They run discount promotions all the time and like to make it sound like something special. Typically, there are a lot of restrictions and add-on expenses attached to the price. That being said, good deals can be had so congrats to you if it's something you're happy with.
I got the same letter and went back and looked up the rules. It does say that some will be given the discounted cruise. I love celtic music but by the time we added the airfare, gratuities, etc it was not a good deal. If we had more notice I might have considered it.
The "discount" voucher, which I also "won", was 3rd prize which they gave away more than there ever was cabins on the ship. I don't consider this a win.