Should you book a Virgin Voyages Lock It In fare?

Lock It In is a price-for-control trade. The fare can be useful when you mostly care about getting onto a specific sailing for less, but it is the wrong place to save money if cabin location or flexibility matters.

Use the fare checker for the price question, then make the cabin-control decision separately. The checker can tell you whether the sailing looks cheap; it cannot make a guaranteed cabin fit a traveler who needs a specific room.

These are the official Virgin pages worth reading before you rely on a guaranteed-cabin fare. The exact terms can change, so treat the cruise line as the final authority.