Costco's CFO doesn't believe his company is 'Amazon-proof'
There are only a few products that Costco has which I want. I am not sure what I would do with a "short" barrel of mayo, or 64 oz. of yellow mustard. But I do so love the Costco brand cooked bacon, the slices are actually thick, and the bacon has good flavor. The big plus is the zero mess preparation.
I think that Costco's products are usually very high quality, and usually come at a good price. Noting that, I found the dog food we feed our dog available at Amazon in 30 lb. bags for less (per pound) then the same dog food in 50 lb. bags at Costco. Since it was available on Subscribe and Save I saved an additional 15%. I find this happening frequently.
If you have a large family, your milage may vary.