Warehouse retailer Costco's (NASDAQ:COST) membership-based business has built a reputation as being customer-friendly. So just how far will Costco go to keep its customers as it battles it out with competitors like Wal-Mart (NYSE:WMT), BJ's Wholesale Club (NYSE:BJ), and Target (NYSE:TGT)? In this third of three video installments, Costco CEO Jim Sinegal talks about keeping customers happy.

Mac Greer owns shares of Costco, which is a Motley Fool Inside Value and Stock Advisor recommendation. The Motley Fool owns shares of Costco. The Fool has a disclosure policy.