This was the worst cruise I have ever taken, based solely on the onboard experience. I was shocked at how bad our cruise experience was. And extremely disappointed.
Stem-to-stern I have never encountered so much unprofessional behavior by any cruise ship's staff. At all levels. We were treated rudely by nearly every member of Diadema's staff. And the overall customer experience clearly indicates that Costa Diadema's staff are among the most poorly trained in the cruise industry.
Dining room staff were rude and bad at their jobs.