Have been a Costco client since forever but haven't had an experience like today until now. As I was walking out of the store, I handed my receipt to the lady standing at the exit door. She counted the items in my cart to verify that the amount matched with the ones listed in my receipt. She noticed they were not the same amount and immediately stopped me. She was very concerned and said that she wanted to verify it with me. I just had 6 items in my cart and the ticket showed 7. In seconds, the cashier was with us and in less than 2 minutes I had my money in my hand and their apologies since they marked am item twice! Talk about customer service! Outstanding!