To each their own. Some people can benefit from good advice, some people are destined to think that they're always right and don't need advice.
I made the mistake of using a Best Buy card for 0% APR even when I had the cash to pay for a new TV. When that TV broke inside of 6 months, I had to pay to fix it because Best Buy wouldn't take it back and the BB credit card offered no benefits outside of the APR. Had I used the advice I offered above, I'd have had 0% APR on the purchase on my Amex and Amex would have replaced the TV without me having to come out of pocket $250 to ship it back to the manufacturer.
Best Buy CC, Apple Financing, etc do not offer any benefit beyond a 0% APR. You are MUCH better off getting an Amex Blue Cash (or Discover Novus, or Chase Ink, or any other quality credit card) with a 0% intro rate as all good credit cards offer purchase protection and extended warranties in addition to a good APR.