Once you install a water softener, your soap will actually lather and those crusty mineral deposits on your faucets will stop coming back. The work usually takes a single afternoon for a pro to plumb into your main line.
Wait for major holiday plumbing sales to book your installer, as companies often drop their labor rates then. Always get at least three quotes from local independent plumbers before you sign anything so you know the going rate in your area.
The 0% intro APR for 15 months is a deadline, not a gift. If you still have a balance after those 15 months, the lender will start charging interest on whatever is left, which gets expensive fast.