There is nothing for a simple buyer to do there. Everything is much more expensive than in regular stores. Even if you take it in bulk, it's still cheaper in the city. And to go so far for some one product at a bargain price - I don't see the point.
The store's area was used irrationally.
There is always one cashier (at least when I was there, there was always one), very slowly serves the uncountable 3 people in the queue.
You can only go to the Matro on weekends, when there are discounts. There are sales. The store is big, there are interesting products. You have to go look, you won't see it right away