I cruised on Carnival Liberty in Dec 2012 on a 7 day- 4 port Western Caribbean Cruise and it was awesome and exhausting! No one told me I would need a week off to recuperate from my vacation!
Miami - Cozumel - Belize City - Roatan - Grand Cayman - Miami
Wow, shore excursions and all the stuff you don't want to miss onboard? It's alot.
Our cabin was 6469 and over the 5th Promenade so could be loud at night if there was a show below us (usually comedy or karaoke), but that was a negligible for us as we ate at the late seating at did not go to bed til midnight or so. If you had kids or were early to bed, this may be a consideration.
Deck has one chair and one lounger. It is possible to open the deck (doors) to either side if you are cruising with the cabins next door.
Cabin is two singles/one king plus pull out couch. 2 tall closets plus one with shelves.
Cabin was very clean and we had no issues at all.