You are trading mornings of lower back pain for actual rest, and once this bed is in your room, you will wonder why you waited so long. The physical work takes about twenty minutes to haul the old one out and let the new foam expand. Memorial Day weekend is the sweet spot for these discounts, so you want to time your purchase right then to catch the markdown.
Before you commit to the first brand you see, check out at least three different companies and test their return policies. Mattresses have notoriously high markups, and getting multiple options lets you leverage a price match or squeeze out a free set of pillows.
That 0% intro window is a strict deadline, not free money, and any leftover balance when those 15 months end will get hit with a steep regular interest rate on the original amount.