Walgreen's mistake = money!!

I went to Walgreen's late Saturday night and had a very frustrating trip. I got 2 shoe inserts, toothpaste and a case of water. I should have spent around $5. Instead, after the cashier refused my coupons, scanned, deleted and rescanned items I was so confused. It cost me $15 and the toothpaste did not print the $2 register reward. It did print the $10 register reward for the inserts. The more I thought about it the more upset I got so I decided to take everything back but the water. When I went back today. The manager was super nice. He told me if I had the coupons with me he would use them. I explained that they had used one of the insert coupons but wouldn't let me use two. He took 2 coupons and handed me a $20 bill. He then explained that it shouldn't print a register reward if I used a coupon (wrong of course but I wasn't going to complain) Since it printed one, he gave it to me. Then he did the toothpaste and handed me a $2 register reward. He then told me if I have any problems again to ask for a manager, that I am a very good customer. I guess he has saw me in there several times a week. So when I look at it I spent $15 and got back $20cash and $22 in register rewards. That's good customer service!!