They reward political connections over merit and they take advantage of good employees by dumping more work with zero appreciation, zero advancement, false promises, and zero extra pay. They have completely incompetent people working in and in charge of offices. If they run into a problem, they just move the person instead of firing them, which means more work for everyone else. Their hiring procedures are inconsistent and sometimes devoid of ethics (no point in reporting it since the people in charge of investigating that aren't necessarily ethical). This is especially true depending on who is in charge of the office you are interviewing with. They'd rather cover up for incompetence than deal with it, and they will have no problem using you to cover it up.
Benefits; mostly nice colleagues