Costco has some nice products, and usually has a good food selection, but there are times when they sell junk products as well. Their health and hygiene section can be hit or miss, and if you're looking for more natural products similar to what may be sold at Whole Foods then your best bet is Amazon.

Costco usually have a descent selection of organic foods cheaper than you'll find almost anywhere else.

One area that I'm disappointed in is their computer selection. Although you may be getting additional support and a cheaper warranty, they simply don't refresh their hardware enough. Almost all their computers are lower end and still expensive compared to what you'll find on Amazon, especially if you price out the cost of building a desktop with much better and newer parts.