When I used to live in Colorado, I had a Costco membership and shopped there all the time. The savings in dog food alone more than paid for the membership fee ... at the time anyway - this was a decade ago. I have no idea if their prices have changed since then.

There was only my son and I at the time, but I still thought it was well worth it. I bought cases of the things we ate a lot of ... canned goods, ramen noodles, juice drinks. We also got really, really good deals on office supplies, like computer disks, printer paper, etc. And sometimes amazing deals on toys and clothes ... I remember once I bought a coat for $30 (can't remember the brand now) that I had been wanting at a sporting goods store, but wouldn't pay the $200 price there.

They do sell mostly brand names, however. And sometimes the brand name version, even at Costco, is more expensive than the generic version at the grocery store. Just kind of depends if you prefer brand names or not.