A Disney Cruise was our happy medium between my wife's sentiment that "Every kids should see Disney" and mine, that "Disney World is the epitome of all that family vacation should NOT be..." This was our second cruise. my wife and I traveled with our kids, ages 10, 8 and 4. From our perspective here are some pros & cons:
Pros:
+Cleanliness; there's a reason that Disney isn't a part of any stomach flu epidemics. The crew went to extra lengths to keep things clean given recent outbreaks on other cruise lines based out of FL.
Shower is great... bring clothespins for the clothesline - wife loved the soap & shampoo; even left her Aveda stuff in the suitcase. Bed was insanely comfortable. drawers are well thought out. Room Attendant can make or break it - ours made it.