There is a limit to the amount of federally funded student loans you can take as a student…it’s $27,000 in total for four years of undergrad.
In terms of repayment, the process is very simple…plus there are a variety of repayment options that are not available at all for private loans (e.g. income based repayment). In addition, you don’t pay on these federally funded loans until 6 months after you leave college. Often, private loans do not have this grace period.