I like to shop at the ASDA in Edinburgh over by the Corn Exchange. I think they have a lot more American and ethnic foods because the store is closer to the students. My sister and niece prefer the store on the east side of town because it's near the Big W.
ASDA has great prices on canned goods and staples. When we do a "Big Shop," we come home with cases of macaroni cheese, chopped tomatoes, big bags of flours, big trays of meats, etc. Their fresh fruits and veggies are a deal, too. We divvy it all up and add up our costs. We figure we are saving a ton of money shopping like this. Yeah, gotta get a Costco card.