BACKGROUND: Second cruise, formerly sailed on Carnival Imagination a few years back. Chose Carnival again because of a positive prior experience, and Carnival's good mix of adult and kid activities, since the dozen of us ranged from age 4 to 68.
SHIP INFO: Our cabins ranged from a 4A to my folk's 12 "penthouse" — which was very nice. Personally, I go cheap on the cabin because I only use it for the 3 Ss, but as a repeat customer I got a bump to a 4B (and a sexy gold card). Even the cheap cabins are nice. The over-the-door shoe caddy is practically a must for 3 girl's bathroom junk, even though there's a good amount of shelf space. Closet & drawer space was more than adequate, bedding was exceptional. Cabin service was, once again, primo — steward always gets a bonus. For interior cabins, a nightlight would be helpful, but we left the light on in the bathroom and the door cracked open. There's only one outlet, so consider packing a power strip.
The Liberty's dEcor is vastly more restrained and tasteful than the Imagination, but I reckon that Jean-Paul Gautier's nightmares are vastly more restrained than the Imagination's weird kabuki dEcor. On both ships, everything was clean and well-maintained.