A beverage fridge clears out your main refrigerator and makes the kitchen feel finished. It takes about an hour to slide into a standard cabinet gap if your power is already ready. You get the best deal if you buy during Memorial Day weekend when appliance retailers drop prices to clear out old stock.
Don't just buy the first model you see at a big-box store. Get at least three quotes from different local appliance shops and online outlets. Sometimes they will price-match or throw in free delivery if you show them a better offer from a competitor.
This 0% period is a strictly timed window, not free money. If you still have a balance after those 18 months are up, the standard interest rate will apply to whatever is left, so stick to the monthly schedule.