Walmart and Kmart scored notably lower than the other chains, but
Costco stood tall. In addition to citing the warehouse club’s rock-bottom prices, survey respondents praised its bang for the buck: It was the only store judged much better than average for value. In our surveys over the years, Costco has earned high marks as a source of a surprisingly large selection of goods, including mattresses, electronics, small appliances, groceries, and books.