Vantaggi
There was a lot of opportunity to pick up hours, as folks often didn't want to work/took advantage of their temporary employees. I listed this as full-time, but technically I was "contract', which meant I didn't have a guarantee of anything; despite this, I was able to work 40+ hours nearly every week because of coverage needing done.
Svantaggi
I literally became everything for every role. I was a trained as a clerk, but I managed to sort packages, letters, ran the front desk (which included bulk mailing, passport sales, retail sales), ran operations, filled in as temporary supervisor (which seems, to me, above the rank of a contracted employee), worked 7 days at a time for long periods of time, delievered mail on route, became custodian when the custodian retired, performed lawn care, and even drove 2 hours away to Columbus at times to do additional training for newer recruits that came in. Aside from this, the only way to advance your career here is to either wait for somebody to retire, or die. That sounds morbid and extreme, but I was offered multiple opportunities for advancement, and every single one was swept away by either somebody with a higher tenure, or somebody choosing not to retire after all and wanted to stay an additional year or two.