We did not stay in the cabins, opting for the Lodge instead, but we did go by and one of the staff gave us a tour.
The cabins are great if you want more room and you like to cook your own meals. However, be forewarned to bring all your food with you as there are no grocery stores in Flamingo and the marina carries a limited amount of things to cook.
The biggest difference in the cabins versus the lodge is the fact the cabins offer a separate bedroom with a sofa bed in the living room. The cabins also offer cooking facilities. The cabins do not have televisions, while the lodge rooms do.