Installing a smart irrigation controller changes your lawn care from a guessing game into an automated process. It adjusts watering schedules based on real-time weather data so you aren't running the sprinklers during a rainstorm.
Most pros can swap out a standard controller in an hour or two. Aim to book this in early spring before the seasonal rush hits, as getting two or three quotes now will help you spot a fair price.
Remember that the 0% intro APR for 15 months is just a window, not free money. If you have any balance left after those 15 months, you will start paying interest at the standard rate, which can get expensive quickly.