It is a floating 4 star resort that takes you from location to location. Casino, art gallery, ship store, spa, pools, hot tubs, and bars. Lots of bars.
If your idea of a "Fun Cruise" is bar hoping, karaoke nights, standup comedy, and bar stool live musician acts you will have a great time. Otherwise it is a reasonably affordable cruise if your interest is in the ports of call and the ship is just transportation with food/lodging included.
... although I've only been on one Carnival cruise and that was just after Covid so maybe my experience was just underwhelming because of timing.