If you are competent and work in the backroom, specifically as a material handler or a donation attendant, you will quickly accumulate tasks that you're expected to do, which will get to be very overwhelming during busy times. Also, there's a lot of turnover with employees that aren't very competent, which results with you picking up the slack for the people who are gone, didn't do the job right, or don't know what they're doing yet. The job doesn't really advance much and unless you're very lucky full-time work doesn't happen.