This our 4th NCL cruise. We are both in our 50's. We had never taken this long of a cruise before and weren't sure if we would like the extra week. As it turned out, we enjoyed it a lot. Two weeks is a nice balance between being on the go and relaxing.
We did excursions at every port except Huatalco. Here is the listing of the excursions we did and what we thought of them:
Categena: Magificent Cartagena. It was a nice tour and we liked our guide. Unfortunately the temperature (in December!) was 97 in the shade, so any walking around was painful.
We enjoyed this cabin. Coffee machine got used everyday for coffee and tea. Comfy bed -- I slept better than at home. Deep tub with bath salts, or shower. Loved the location, because for a change it seemed like most things were either AFT or MID.