From what I know and have heard, working at McDonalds is far superior to Wallmart. Don't know 'bout montana but the Mcdonald's here in chicago all have hiring signs up and they start at ~$9/hr while the walmarts here are still at bare minimum wage.
I've also heard from some recruitiers and friends who do hiring for their companies that they still consider a good tenure at Mcdonalds a very big plus on applications. It's a hard job that most people can't stand to do. It shows you can put in your dues, do the dirty tedious work that normally goes unrecognized.
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