Been on a few cruise with my kids and Jewel was just average. Not RCCL's most up to date ship with a very small pool area (and pool), and next to no deck chairs available if you don't reserve one before 08:30. Do this even though they say reserving is not allowed. Nobody pays attention. Unfortunately no pool side BBQ's, you have to hike somewhere to find food and bring it back to your deck chair.
While the service and entertainment was great as per RCCL's standards, I found that family activities were sadly lacking. Parties in the bars were the main focus as this is a revenue generator for RCCL. Food on board was only average. While at the pool area on day 2, was sitting in the jacuzzi talking the previous nights dinner and most seemed to agree the prime rib didn't really taste like beef!!!!!
While I would do RCCL again, I would steer clear from the smaller ships and go to the newer ones such as Oasis. They do tend to nickel and dime you as well. You must buy the soft drink package for the kids (free on Disney) and ship board drinks are extremely expensive, so smuggle if you can!!!! Disney allows you to bring a bottle or 2 of booze without smuggling, they just ask that put it in your checked baggage. They won't make you feel like a criminal and you won't get surprised by a two ton bar tab at the end of your trip!!! Happy cruising.