Pros:
24 hours pool and hot tub (Pools/Hot Tubs on Carnival and Norwegian close early - around 6-8pm).
Indoor pool, hot tub and atrium. A very nice and relaxing setting.
Cabin 3640 was smaller than similar cabins. The bathroom started about 1 foot + from the wall (by the cabin door). I presume that this space was for wiring and/or plumbing. The end result was getting a chair in the cabin rather than a 2 seater loveseat as found in other cabins.