Buck island snorkeling

Anyone did the Buck Island snorkeling? Is it worth the 100$/pp that Celebrity is asking for?

I can't decide if I do the Cruzan rum visit (take a taxi and go there) or if I book this snokerling tour. It's somewhat expensive. I already have excursions booked for St. Kitts, Dominica and San Juan (before departure flight)... A total of over 400$ in tour I want to book.

There's currently a promotion ending on November 30th with Celebrity and if we book excursions in advance we can earn some on-board credits. For example, 3 excursions booked will give 20$/pp OBC. 4 excursions is 40$/pp OBC and so on... 7 tours booked give a 100$/pp credits.

Finally the boss has spoken (wife). Enough excursions already so we'll stick with the Cruzan tour instead of the Buck island snorkeling.