Remember when this place was Fortinos? That's why this mall (Denison Centre) is also nicknamed the "Fortinos Plaza".
Anyway...this supermarket is extremely large, almost the size of some Costco or Walmart Supercentre stores. While it is large though, the space isn't utilized very well, as there's a lot of empty space area in the store.
Personally I wouldn't come here unless there's special deals going on. Thankfully, Oriental Food Mart advertises heavily on Chinese TV and newspapers, and they have various special deals on every week. If you see something that interests you, then definitely come here!
Cashiers are about your typical Asian service quality. Don't expect much, don't expect to communicate. Just pay, get your change, and depart away.