Pros
I lost 35 pounds as a letter carrier and haven't been this lean for 20 years. My fellow letter carriers are great people who help out when they can. Pay is good, but not enough to overcome the harassment of management to rush, rush, RUSH!!! If you become a "Postal Carrier" life is good. As a City Carrier Assistant they will run you into the ground and say "tough luck".
Cons
Stress is mind boggling and never lets up. Changed route without adjusting the amount of time allowed for Certified and Express deliveries. Supervisors literally watch over your shoulder as you case your mail, tapping their toes so you know, they think you're wasting time. Trucks are rolling crap. Either they lock the brakes or don't stop at all. Gear shifter cannot find proper seating for reverse or drive, if the engine doesn't stall.