I am cruising October 5th on the Zaandam (Montreal to Florida, my second cruise ever!) and booked my shore excursions through Holland America at the beginning of this month. Someone on Reddit reminded me of the Best Price Guarantee, so I decided to try it out last night. Of the four I submitted, three were approved for a total of $71 OBC. Hurrah! The one that got denied was because the comparison excursion wasn't within the time frame that the boat would be ashore (ended after the ship departed)