Of all the things I have heard about Disney Cruises, the one I hear the most is that it is definitely worth the extra cost for Disney. In a few areas I agree with this.
The ship is beautiful and the Disney touches make it very special. However it is missing some of the expected essentials of today's ships such as a library. The TV in the cabin was extremely small. No interactive services are available on the TV such as checking your onboard account or ordering room service. The fitness center is nearly impossible to find and is very tiny. The family and children's pool areas are small and always crowded, while the adult area is virtually unused.
I booked an inside guarantee category 12 cabin for my daughter (age 12) and me. We were upgraded to a larger inside cabin, category 10. The cabin was a good size for the 2 of us. Having 4 people in this cabin would be very difficult as the storage space was quite limited, especially in the bathroom. The split bathroom is a nice feature, but the 2 rooms are very small and you can hardly move around in them (we are skinny people!). Having a bathtub was convenient but glass doors, rather than a shower curtain, would be a better choice. Unless you want adjoining cabins I would recommend not booking an adjoining cabin as it was very noisy on the side of the cabin with the door. The cabin in general was fairly soundproof, although you could hear the music playing in the hallway when it was on, children running, and babies crying at night. The safe in the room was located in the closet which is convenient, BUT only ONE card's magnetic strip could be used to open it. This was a major inconvenience for the 2 of us using the safe when we were not both in the cabin.