We got pretty lucky too. We're on INDY for a three day cruise in May and were able to sign up for The Key at 20% off (19.99 per day / person). We were going to purchase the Internet package anyway at 18.99 / day / person, so for an extra $6 we get all the additional perks ($6 for lunch for two at Chops is the way we're looking at it ? )
The rest will just be gravy. We'll still be tired from flying across the pond so any additional perks will be most appreciated.