Jade is wonderful; sailed on her a couple of times.
My one and done is the Celebrity Century. A truly god awful experience. It seemed she was being used as a training vessel, so inexperienced and unskilled (and sometimes really RUDE) staff all the way to Hawaii and back to San Diego. And it seemed the stabilizing system was off, so I was actually seasick and immobilized for three days, nibbling dry toast and tea and looking at a television the size of a toaster. Much of the food was spoiled; people got spoiled milk, there were spoiled vegetables on the Mongolian barbecue area, etc. And the rest of the food was SUPER salted. There must have been something wrong with the desalination equipment. She has either since been sold or sunk, but it was absolutely the worst.
Now I am kind of concerned that people don't like Breakaway! I haven't been on a really big ship so this will be an experience!