Emart in the I park Mall next to yongsan station has everything you need be out groceries, clothes, electronic etc.
The prices are good. Whatever you buy, you can get vat refund on it. There kiosk is after the billing.
The mart is quite big with plenty of vegetable and fruits, which is my favourite. You can hardly find those fresh food in a emart24 or other convenient stores. It seems after a certain hour they will have discount for many take away food.
The place is quite big, has 2 floors. The 1st floor, has household items, the lower floor for groceries. They have prepared ingredients ready to cook, which is a good choice. The fruits and meats are fresh.
This is the way to get to know Korea! Supermarket deluxe with way more than what you need but the food section was great to find out what everybody is really eating. There were also some great discounts on the ready made meals which were pretty decent! You would never find this quality in Europe!
5 stars only for a guy who works in Electromart in Emart, Apple area - he spent more than half an hour with me trying to help me order an iPhone, he was so polite and kind, he's a real guy.
Emart itself is fine, it's big and has everything you'll need.