We just got a costco at North Lakes. It's only about 10 minutes away from us. You need to know your prices, but I compared prices on the first few shops we did and we made back our annual fee on the first shop. I found that fruit/veg can be more expensive, but things like dishwasher tablets you can save huge amounts on. I have managed to resist the temptation of all the US chocolate - so far. : )