Standing in the dark near Vik while green light twists across the sky is worth every bit of the hype. Aim for the shoulder season four months out so you can grab flights and guesthouses before prices spike and the best spots fill up.
A typical week-long trip runs about $2800 for flights, lodging, and a rental car. Spreading that cost out over time makes the math a lot less painful.
The intro window is a deadline, not free money, meaning if you still have a balance left when those 18 months are up, standard interest kicks in on what you owe.