We have only stayed at AKL with our kids, so that's the only hotel I can tell you about first-hand. My kids loved it!
There are so many activities to do: animal viewing, night viewing, flamingo feedings, animal tracking, junior researcher, cookie decorating, animal games, music of the savanna, medallion rubbings, great pool with lifeguard games, arts & crafts w/ the lifeguards, hidden mickey hunt, nightly storytelling by the firepit, and a great gift shop which my kids loved.
On our last trip, we extended our vacation just to have some time to participate in the activities at the hotel. It was great - and very relaxing.
Hope this helps.