I spent years swearing by "guarantee" cabins to save money on cruises. After dozens of sailings, my luck began to run out. Allie Hubers For years, I booked cheap "guarantee" cabins, where the cruise assigns you a room, to save money. I was perfectly happy with my assignments for dozens of sailings, but my luck eventually ran out. As cruises have become more popular, I've chosen to spend extra to strategically select my cabin. Booking a "guarantee" cabin used to be one of the easiest ways I cou