Sailed the Carnival Freedom, my first and last Carnival cruise. No matter how much fun we had, nothing could make up for the "rocking". The Freedom rocked every single day. We were a large group and at least one of us were in bed at least one of the days with a sick stomach.
The ship decorations are sort of tacky, the buffet food lines were long. I really felt like I was at a Shoneys or Ryans in terms of food.
The dining room food was a little better, but a hit or miss each night. I ended up isolated in my cabin the final day with a stomach virus. They brought me clear broth, rice and ginger ale on a tray with a "hazardous waste" bag to seal it in when I was done. The bag was probably the funniest thing I've seen in a while.