My husband and I and another couple went on the Carnival Dream in May, 2011. Overall, we had a great time. Ship was the largest we had ever been on, but we had no issue getting around and finding things. Pools were always crowded, but we've come to expect that is standard on cruises. Never had an issue at least getting a deck chair (so long as you didnt want to be near the pool!)
Stateroom was very nice. We were concerned about the size because we had heard mixed reviews about these aft cabins with longer balconies, but we thought it was plenty big by cruise standards. True, there is no couch, but we never just "sit" in the cabin anyway so I preferred having the larger balcony to sit on. The balcony has a deck chair, small table and regular chair. There is a long hallway into the cabin, which was nice because I think it insulated us from any hallway noise. I would book this cabin again. One word of caution for those prone to seasickness - being so far back on the ship can prove to be interesting in rough seas. We had two days of choppy water, and bounced around pretty well! Our cabin steward was WONDERFUL, by the way.
Food was good - standard breakfast; we didn't have lunch everyday but it seemed fine; dinner was fantastic. We did eat in the steakhouse one night for an additional $30pp, but well worth it. Highly recommend! After hours food seemed sparse, and the pizza was HORRENDOUS (but you are dealing with a NY-er here). Pasta bar upstairs from the buffets was a nice find on the last day.
I will say the wait staff on this ship was no where near as good as our experience on the Carnival Freedom. They were certainly friendly enough but the level of service was not of the same caliber. In general, I will say, with the exception of our Cabin Steward and the other people servicing cabins, the staff seemed a little more "abrupt" than our previous experience on the Freedom. Not enough to damage our trip in any way but definitely noticeable. Particularly the karaoke host(s).