I've been there several times - it's in my neighborhood and it's handy for a quick Korean fix. The owner, Okcha, is very friendly and remembers her customers. The space is small, and doesn't really have much of a kitchen - she has a couple of large rice cookers and cooks on a couple hot plates. Especially for what she has to work with, the food is good and plentiful. I'm very happy that she opened up so close to me.
She mentioned that her sister and brother-in-law have just opened their own Korean restaurant (Red Top) in the old Heat space at North & Sedgwick. She says that the food is wonderful. They opened up just a couple of weeks ago. It sounds like a more upscale place, not a Korean fast-food place like Bbop.
-gtgirl