I paid $50 for the adult soda program last week on the Majesty. It was the worst money I spent the entire trip!
It tasted awful. I regreted it after the first day. Each time I filled the cup it was a different taste. It was flat and had a horrid taste. I could tolarate the Sprite more than the Coke. I ended up buying an 8 pack of Pepsi in Florida to last me the rest of the cruise.
I noticed that some guests brought a case of their favorite soda as their carry on when boarding the ship. I wish I would thought or known to do that.