small, inconsistent raises
no full-time availability - LITERALLY no full-time. They don't want to pay for health insurance/benefits. the only chance of full-time is getting a management position.
you can be working from anywhere between 4 in the morning and 11 at night (at my store at least)
no guaranteed minimum hours - your managers can put you on for 4 hours if they feel like it, but to be fair, if you're a good worker that probably won't happen
you likely can't live on your pay from here - you'll probably need another income