I would not advise you to go there.
For someone who is almost Diamond Plus on Royal, I would say this. NCL may be cheaper but then they must know what their cruise is worth.
Besides, I still remember you Wall Mart cruise.
Carnival Liberty New Year's Eve 2007
Liberty of the Seas 5/2008+11/2009
Allure 1/16/ 2011
Independence of the Seas 12/29/2013
Booked Allure of the Seas....12/27/2015