GOLFERS BALLS AND COSTCO

Golf insiders, even those at the poshest clubs, are talking about secret trips taken in the early morning to Costco to look for balls. The Costco brand, Kirkland, sells golf balls that, according to the WSJ, match or outperform balls costing twice as much.  What other generic brand of product is at least as good if not better than name brands costing twice as much?