I concur with other reviewers that the place is hard to find, and even outside the building there is no sign to suggest you've reached your destination (the restaurant is upstairs).
I wouldn't have minded paying the €23.50 for my Mongolian Style Lamb main course if the dish merited it, but it didn't (having to pay extra for a small bowl of rice certainly didn't add to the experience) but the meal was bland, the sauce was so mediocre. It was really nothing special. My partner's duck at €26.50 didn't fare much better. With a tip the meal came to over €100 for two (without wine). All-in-all, disappointing.
If you own or manage Kwam Suk, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.