I work at Costco in the US. They offer great prices, but everything is sold in bulk. Well, all the food, cleaning, and pharmacy type items. But everything is packaged "smart". So, you may be buying a huge bag of chicken breasts, but thy are all individually wrapped, so you can freeze them, and only take out a few that you will need. Also, everything at Costco is brand name, or Kirkland Signature (which is the store brand). The store brand is always of the same quality of brand name products, or better quality. There is a membership fee, but if you just buy your milk there, it will basically pay for itself. People looooooove Costco here! I mean, they are kinda obsessed with it! I do all my shopping there, because I know I am getting the best deal out there. I could probably find similar products at other places for cheaper, but they wouldn't be the same great quality I've come to love. Plus, as an employee I get a free executive membership, where I earn 2% back on all the purchases that I make. I get the 2% back in the form of a check at the end of my membership year. This year, I'm getting over $200 back!! Here in the US, the executive membership is only $100. SO, if I had to pay for the membership I would have a free membership and extra money to spend on whatever I want. So, if you plan to spend a lot of money at Costco, it is def. something to think about getting. Buy a big screen TV with an executive membership, and it has almost paid for itself right there. Well, have fun with Costco Australia, hopefully one day I will travel and see the store!!