Not a great place to grocery shop. They do carry some high quality, unique grocery items that aren't available at most grocery stores. Costco also has an unbeatable return policy so I like to buy electronics there. I've returned a couple of sound systems after trying them out at home. If I'd bought my crappy google nexus tablet there, I wouldn't have had to buy a new tablet when it stopped functioning 11 months later.

But you're right that it's certainly not a shopping panacea.