Stayed there twice before and got a 1 cat upgrade as Diamond.

Can choose free breakfast or 500(?) points.
Breakfast was a basic hot buffet type breakfast. It was ok and nothing fancy.

It is very near to a subway station, 1 stop away from Gangnam station.

They also gave a free drink coupon at the attached cafe, buy only good for certain basic drinks.

The room was quite large, clean and modern.