We did the Costa Rica precruise and it was full of adventure (river rafting, ziplining, a boat trip, etc.). There were some glitches with times, meeting points, etc. but I think that will work itself out. Our guide and bus driver were very good. The hotels were interesting and different but nice. An excellent pretrip.
Uncruise is camp for grownups and the Voyager was as well. Our cabin was very small but functional. Dining was excellent. Service was excellent. There is no entertainment per se but slide show lectures about nature and the environment. Every day we had choices of activities and they were all good. I did hiking mostly. It was not difficult and I saw lots of animals, birds, plants, etc. The guides were very knowledgeable.
We enjoyed all of our fellow cruisers. Hard to guess ages but almost all retired professionals.
Very small but efficient. Clean. Couldn't open the window shade because the sun made the cabin too hot quickly. Air conditioning was either too cold or too hot and it was very humid so our wet stuff wouldn't dry (bathing suit, wet shoes, etc.).