-Without exception, you always get hired as part timer. No minimum hours guarantee unless signed a crew.
-Dismal work/life balance- always.
-Split shifts are very hard to acclimate to. (8 or more hours between pieces are common - no compensation for the wait period on splits)
-Very seniority based advancement which is perpetually discouraging. (Do not overlook consideration of this if advancement is your goal). If you are thinking about starting as a driver with aspirations of advancing internally - look elsewhere. Advancement is nearly non-existent and while job competitions are technically open to everyone, part timers are not considered for full time non-revenue positions.
-Stressful work conditions and demanding customers.
-Considerable time to reach full time status (could be several years).
-Weather is a constant consideration.
-Pay premiums for part timers in lieu of benefits.
-Part timers can only ever receive a maximum of 3 vacation weeks and generally only one week can be split into single vacation days.
-Feast or famine for overtime / extra work.
-Often minimal rest periods with little effort from management to improve that.