Costco says on its website, "We guarantee your satisfaction on every product we sell." Being friendly is practically a requirement to work at Trader Joe's. In fact, only two stores beat Trader Joe's in a consumer popularity survey this year.
It's a mild controversy, as those things go, but one hotly debated nonetheless. See both sides, and whether you should join them.
In the latest trading session, Costco (COST) closed at $563.83, marking a -0.09% move from the previous day.