Now thats an Oxymoron!!
Last time we were there I didn't see a Sizzlers, the one outside the Rosen at Pointe is gone.
In my experience, they can be depending on the resort. POR for example has some great themed rooms (Royal Rooms), as does CBR (Pirate Rooms).
AKL is a great resort, themeing is great and seeing the animals is the nice way to spend some time.
My only gripe would be the distance to just about everything that isn't AK. The Disney Transport seems to get very full, and the journeys are long (the resort is right out to the west of WDW). If you are renting a car, you'll probably use it alot.