I have not seen it myself, but have heard that the show is good. There is usually a pre-show entertainment, followed by the main Pirates show with a Spanish Galleon theme. There is (or used to be) a disco of sorts after the show and a complementary (for show ticket-holders) visit to a small Pirate Museum.

Like with almost all the dinner shows, the food is likely to be ordinary at best. Be prepared to be disappointed with the food bit.