Also, you do need to explicitly specify you want to use the interest-free installment option when making the purchase. It's not automatic, even when buy an Apple product at an Apple Store.
Yes. I found this out after purchasing a new laptop for my wife. One call to the Apple store that I bought the device at fixed it though. It really was (mostly) painless.
Oh, now that's interesting news. I never would have thought of that! The one time I did it wrong was on a small enough item I was able to pay it quickly via savings.
I mean... isn't that how most interest-free cards work?