One word of caution with using the safe is to make absolutely sure you and everybody in your party check the safe for contents before you disembark. Some people are so distraught when they are told to vacate the cabin at the end of the cruise, they forget to check the safe. It's one thing to forget that extra pair of underwear in a drawer; it's another thing to leave your camera with the embarrassing Cozumel pictures in the safe.
As a few unhappy cruisers have reported, "stuff" left in safes may or may not return to the rightful owner. If it does return, it travels via Miami.
I am a Cruisaholic; "I'm Not Dead Yet"
Carnival Inspiration, January 17, 2014 Long Beach, CA *** Carnival Liberty, March 22, 2014, Miami, Florida *** Carnival Miracle, September 10, 2014, Seattle, WA *** Carnival Freedom, March 21, 2015, Fort Lauderdale, FL