This same ? was asked on Aug 26th if you go back there are great responses. I copied and pasted my answer to her here for you (too lazy to type again hehe) Hope this helps :) Oh and when the Costco openes you can go and look around and check it out but you cant prchase unless you are a member.
I worked for Costco for 13 years and my Husband for 19 (and going) so I am a little biased. IMO Costco has better products and great deals. The comapny will not sell an item that they cant get for members cheaper (they almost stopped carring all coke products because of this when the company tried to raise price). Also everything you get is 100% satisfaction garanteed. If you buy a product, use some, dont like it, return for refund. The only time limit on item is tech items which are 90 days but they gave a conceirge dept incase it breaks where if they cant fix it they replace under manufactures warranty. The membership is also refundable so if you try for a couple of months and its not for you, you can get a refund on memership. I am not a big fan of Sams club (also not a fan of Walmart which os same company). You can shop at Sams without being a member but you pay a higher price then members pay. Costoc does take Costco issued cupons books which come out about once month (cupons are good for 4 weeks and then a week after a new one comes out) usually 30-40 items in a book. You can go to Costco.com and check out whats on cupon right now. They strive for great customer serivce and really take care of their employees. Like I said I am biased but wanted to share my inside opinion for you.
Costco does take food stamps now and they do have a house brans (Kirkland Signature is house brand)