I've been to Kikuya, which is on 55th just east of the Metra tracks. The food is strikingly average and I could not recommend it. They do a lot of catering business for the coffee shops on the UofC campus, too, and I've never had anything that was worth noting.
You may be out of luck in your search for Korean food in Hyde Park. For six years of living in the neighboorhood, I always made the trek to Lawrence for Korean.