We stayed at AKL last December and the decorations are quite lovely. The trees are covered with natural dried flowers, gourd ornaments, natural toned bead ornaments, bird feathers etc. It is very subtle and natural. It does not scream Christmas - so if that's what your looking for, this will disappoint. It is very beautiful in a natural understated way.
Last year down at Boma, they had their "Gingerbread House" which was a miniature African village. Inside Boma they had a traditional mask made out of chocolate.