The New York Times has an interesting comparison between Amazon and Costco, my two favorite stores: Amazon’s Subscription Service vs. Costco. While the author complains about the time lost shopping at Costco, I love that store because its a great place to add steps to the pedometer, particularly in inclement weather. Oh, and I can also get some shopping done at the same time.
My only complaint about Costco is that outside of some staple items, the availability of their other products is far from guaranteed. For example, I recently headed to the local Costco for some parchment paper. I knew the exact aisle it was located in, but when I arrived there, it was gone. Not just out of stock, but discontinued.