St Kitt's has little to do on it so be prepared. We did enjoy the scenic rail and learned alot of history of the island. Some we spoke to didn't think it was worth the money but in light of our options we enjoyed it.
Beautiful island if you get out of the ghetto city where you get off the ship. Be prepared unlike other islands they are going to price everything in euro's. We took a cab ride which we were told would be 80 dollars and when we got back were told no no that is euro's which turned into 120 US. Also be prepared that almost no one we ran into spoke english, it's all french.