Basically you only pay a small percentage of your income back each month. Like, if you are earning $100 you might pay $5 (I forgot the exact percentage but you can look it up on finaid.com). There are a couple risks to this:
1) If you ever make loads of money, you could end up paying loads back each month and
2) If you do not pay off your entire loan by the end of the payment term, the amount is forgiven but you need to declare the forgiven amount as INCOME on your tax return and therefore pay taxes on it.
I seriously doubt this is the ideal repayment plan for you. I don't think I know one person that has chosen this plan.
