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.

Check out the first two video installments of our interview with Jim Sinegal:

Listen to the entire audio interview of our conversation with Sinegal at www.motleyfoolconversations.com, or subscribe through iTunes.