Do the Costco warehouses in the U.K. (specifically any of the 3 in the London area...Chingford, Thurrock and Watford) have anything unique compared to the ones in the U.S.? Assuming I have enough time, I'd be willing to visit one if any of you who have shopping experience at both U.S. and U.K. stores think it's worthwhile. My wife and I are big fans of Costco stateside and have noticed small differences between U.S. locations, more so if you're comparing more distant sites such as Puerto Rico, Hawaii and Alaska. Are all 3 London stores equally accessible via public transportation or are any of the three better in that regard? Those of you who have no experience with Costco might think I'm nuts, but they really do sell quality stuff at decent prices.