What a great company.  I've always admired how they keep prices low while managing to treat their employees well - the anti-Walmart, if you will.  However, I rarely shop there because it's not all that convenient for me.  My credit card statement with next year's membership showed up and I decided I wasn't using the store enough to justify the fee, so I called to cancel membership.  They immediately said "no problem" and backed out the $55 credit card charge.
 
Ten minutes later the phone rang.  It was Costco calling to tell me that since I had not shopped there a single time in the previous year, they were going to give me an additional $55 refund for the previous year's membership.  Is that a classy operation or what?

Oh yeah!  Bulk products are great (if you have places to put it all).
 

 
For those on a high fiber diet. 

I love Costco and have been a member since sometime around 1990 ... at one point we actually bought a car through them.
 
My only concern is when you are in the store, it is easy to loose perspective when it comes to the size of an object because the store is so big.

craigb
 

 

That's a bass trap in your studio, right?

The Mrs. yammered away for months about wanting to go to a similar store here in the east. Finally we went, paid the fee, got the bigass cart and started shopping. 2 hours later she's pushing this ridiculous over loaded cart and I'm walking beside putting the stuff that's falling out back on top. The cashier started ringing up this stuff and when it got to over $500 I swear my wife stopped breathing. She just got this glazed and dazed look in her eyes. I couldn't help but laugh at her. I think there is still half a box of ice cream sandwiches in the freezer in the basement. 50 seemed like a logical amount at the time. We haven't been back.

Randy

There is a kind of treasure-hunt quality to browsing Costco, because the inventory is so fluid.
 
Sometimes they have those cheap Yamaha synthesizers that cost little more than a MIDI controller but could actually be useful for recording. One day they had Kawai digital pianos. Shoppers thought I was a product demonstrator. I've had club gigs with smaller crowds. Shoulda gone a couple aisles over and found a tip jar!
 
You just never know from week to week what you'll find there. 
 
Last Sunday I noticed some little guitar amps that looked interesting, perhaps falling into the so-bad-they're-good category. Didn't stop, as I was on a mission to score some roast chicken, but I'll have to get back and check them out before they disappear. 

How was the chicken Dave?
 
Do you 49 in the freezer like Randy?

For me Costco is eggs, butter, becan, salmon, steak, water, diet green tea, English muffins, those thin slice "bun" bread circles and about once a year the 100 CD-R pak.
 

Hi,
 
For a large family, a place like this is good. For a single person or just a couple, this place is OK, but you have to figure out some logistics so you don't waste food.
 
They buy things in large quantities, thus forcing a lower price, btw! But what does that say about all the other chains? ... you got it!