We went on the Disney Wonder to the Bahamas back in 2006.
It was definitely VERY kid friendly. My son was only 10 months at the time and I still felt like there was plenty for us to do with him. My nephews were older and had a blast. We aren't ones that leave our kids with the babysitting services, so I can't comment on that, but everything else was definitely top notch. The food was excellent, the staff was so friendly and helpful (my nephew still talks about our waiter), the coordination of the meals ran smoothly, and the ship was spotless.
My only complaint was that the family pool was always extremely crowded so we only went in it one time.