Pros
Job security, learning opportunities in the maintenance craft and excellent benefits with retirement package. Good salary for someone without a college degree or profession or ability to succeed in the private sector. The large majority of employees are very dedicated to their profession and proud to represent the USPS.
Cons
Golden handcuffs ( meaning it is hard to leave once you are vested and comfortable ) Mindless boring work if you are involved in actually sorting the mail. Shift work which includes weekends and holidays, especially in the early years before attaining seniority. Management selection process lacking with promotions awarded by an out of date EEO system which uses race and gender quotas as the primary criteria for advancement.