At first, learning the necessary skills for the USPS was quite arduous. After the skill set and random tidbits of information are learned, however, it is not a difficult position.
Management is more often than not scattered and seeming left out of the loop trying to figure out what to do, and as a TE I rarely knew what I was going to be doing the next day (the TE position was cut short 6 months into the one year position in order to cut pay from 22 to 16 and to allow the USPS to hire more of the same workers for less).
A typical day would be sorting mail, loading the mail truck, getting any other special requirements from the managers and then delivering the route. Things changed daily though so it was never this straight forward. Co-workers were all wonderful, however. The hardest part of the job is definitely learning the routes and how to "read" the mail.