I am a costco executive member. Costs me about $125 a year. I buy enough stuff there that I get back around $300 a year. So negative cost to me plus i use their cash back Visa card. I get back between $600-$700 from that annually. I also buy top quality TVs and Tires there. I love Costco. Plus I don't need to fumble for a quarter going to the store for a cart.
Yes, Costco is certainly a good option based on your family needs, location of store, etc. Our children are grown and gone, and we eat out almost everyday. So bulk foods buying is not compatible. Besides, we can always tag along with friends who are members, to buy certain items and pay cash.