Pros
Rural and City carriers have their own unions and the pay is livable.
Cons
If you are not the fastest paced worker you know, don't work here. If you have a disability, don't work here. It takes a certain type of person to work as a carrier and if you don't fit in that box, they will get you out ASAP. As the new person they will work you like a dog and try their best to offload anything they can get away with onto you. If anything is too inconvenient for them, they will "forget" to take it with them and then the post master will put the workload on you to finish their work. They push "speed" to the limit of reckless endangerment. They set routes based on mileage, so they set up these extremely inconvenient routes that would take the average person about 14 hours to deliver all the mail and packages to buy they want it done in 8 hours. Then you'll see other carriers complete their routes in 4 hours but I've driven with these lunatics. If you don't hold onto something, you will leave with a concussion. I don't know about city carriers but rural carriers can be some of the cruelest sociopaths I have ever met and I wouldn't wish that kind of job on my worst enemy.