If you know Costco, this is like a Costco. Except that you don't need a membership to go in!
Their layout is very similar to the Costco one, but less crowded. They have a lot of frozen goods, prepared ready-to-eat food, bakery, etc.
The badside is that the quantities are big, so you'd better have a big family or a group of friends to share most of the things.
There´s a small starbucks in the building, as well as their small cafeteria serving pizza, soup, hotdogs, etc.