Just finished watching Criminal Minds because of Lee Joon Gi and Moon Chae Woon. This drama is not nearly as nice as Flower of Evil. Quite disappointed with the story flow, the mini-stories were not told in an engaging way, and it seems like they were told hurriedly in order to fill in the gaps in the series. The casts are superb though, great acting, and wonderful visuals. Nice production also, as expected of most of Korean dramas.

Haven't watched the US version of it, so I could not make any comparison.