Opening your closet doors should not be a daily rescue mission for missing sweaters and tangled hangers. Getting this right means you can actually see what you own, and you stop rebuying things you forgot were buried in the back. January organization sales are the best time to buy modular sets because retailers slash prices right after the holidays.
Expect the physical installation to take a couple of days once the materials arrive. Before you pull the trigger on any single provider, get at least two different quotes so you know what the materials and labor should actually cost.
Remember that the introductory window is a strict deadline, not free money. If you still have a remaining balance when those 18 months end, deferred interest or standard rates will kick in on whatever you owe.