We have tried Isola a couple of times (comped by the casino) and have not been impressed either time.

Not sure I understand the issue with getting a refund on the Sunset cruise?? I have been on Regatta spectator boats with multiple people sick. One time someone was sick before we got out of the lagoon! If the boat went out and completed the tour there would be no reason for a refund unless I am missing something. Please clarify.