Macbook 90 days delay payment plan

I am a college student and I'm planning to purchase a Macbook Pro ($1,699, college discount included) and just found out about the monthly payment plan. If I am understanding this correctly, its a plan where for 90 days, you do not have to make any payments, and no interest is added on it, then on the 91st day, I would have to pay around $45 monthly. So what I planned to do is purchase the Macbook with the payment plan today (August 5th) , then my college grant refund that comes in about 3 to 4 weeks after school starts (School starts - August 18th; 40 days after September 27) would be used to pay the whole thing before the 90 days (November 3rd).
To me it sounds like a solid plan, but I'm still kind of nervous on taking out a loan. Also, this is my first time doing student loans and grant, so that makes me more uneasy. Can I get an opinion on this plan?
Asked Aug 05, 2014

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