Watch out, and maybe avoid. The cashier lady *will* yell or raise her voice at you if you so much as make a misstep ordering. By that I mean that you need to know you want "Stir Fry, w/x-flavoring", speak really clearly or else she'll snap at you. I almost walked out.
(Doesn't matter if you're speaking French or English, this will happen. Wonder what Concordia students think...)