We have been buying the Cruise Next.
Buy $1000, get $2000 and some onboard credit. Onboard Credit unused, went towards the $1000 credit. Making the deal more sweet. CN credits can be doubled for Balcony, are transferable, and dont expire.
If I'm reading the Cruise 1st info properly, you cannot use them on short weekend getaway cruises. Only 6+ day cruises. I don't see a double up option for Balcony and higher staterooms.
And they expire.
I'll stick with the Cruise Next option.
We'll definitely be purchasing more on our next NCL Cruise.
Cheers and happy cruising!