We've been on 47 cruises on 11 cruise lines and just got off the Carnival Glory today. I'm here to tell you this cruise ranks #47 on our list - it was definitely disappointing and the food was not good at all.
We've cruised on Carnival several times and have always had a very nice experience, but this was was extremely disappointing and none of us enjoyed it.
It really does depend on the ship and when you go. We've been on the same ship 3 times and have gotten 3 different experiences, so what you get one time is not necessarily what you'll get another time. And what one person loves, another will hate, so just because one person had a great experience or a negative experience does not mean you'll have the same experience.
Just choose what you think is right for you and enjoy the experience.