Your kitchen changes the day a smart convection wall oven goes in, letting you preheat from your phone and bake with even heat. You will want to line up the install during holiday kitchen clearance events like President's Day or Labor Day, when appliance prices drop and installation crews run specials. The swap usually takes a single morning if your cabinet cutout is the right size, but you need to budget for potential electrical updates if your old unit was gas or lower wattage.
Before you commit to a brand or installer, get at least three quotes from local contractors. Appliance stores often bundle installation, but independent electricians might charge less for the hookup. Compare the total package including haul-away of your old unit and any required permits so you do not get stuck with hidden fees on installation day.
Remember that the intro window is a deadline, not free money. If you still have a balance left when the 18 months are up, deferred interest or standard rates will kick in on what you owe.