Pros
Good benefits if/when you become a regular employee (have your own route).
Cons
Very heavy package load because of USPS's deal with Amazon. If you are a sub carrier (RCA/CCA), then expect to be worked 10+ hour days, 7 days a week. Many of the regular carriers I know had to wait 5-10 years at least to get their own routes (on the rural side, city is different). Time spent as a sub does not count towards retirement. Routes are evaluated, meaning you only get paid for evaluated hours on a route, not actual hours worked. So, you could finish your route and then be made to cover 1/2 or more of another route when you get back to office and not get paid for it. Continually short-staffed. Management just sees bodies. Union reps' hands are tied on many issues that directly affect the welfare of employees, rendering them useless. Example: Working 6 days a week as a sub and then having to work Amazon Sunday. Rep could not do anything about it because Amazon Sunday is mandatory. Basically, some subs only get 1 or 2 days off a month, if that, depending on the office they work at. Also, Covid restrictions were not enforced- employees were not informed if an employee they worked with tested positive for Covid. Mask mandates weren't enforced. Equipment not disinfected. Bottom line: If you want a home life and don't want to be worked 60+ hours a week, then I would not recommend it.