read the small print
To make oneself aware of the specific terms, conditions, restrictions, limitations, etc., of an agreement, contract, or other document (often printed in very small type and thus easy to go unnoticed). The terms of the loan look pretty good at face value, but be sure to read the small print, or you could find yourself in a heap of trouble down the line. I know reading the small print can be tedious, but it's always important to know what you're getting yourself into!