I Loved it. I think one of the very few K-Dramas I watched without missing a beat! Its also one of the first dramas where I didn't mind that it didn't have a love story. All the characters remained professional from start to end with sole focus on criminals!
True to the name and theme, it was all about NCI finding criminals. The little sneak peak of background stories of each characters were like cherry on top. They didn't delve much into personal lives other than what needed to weave it into the plot.
It was also perfectly excuted.
I am an ardent follower Criminal Minds the original English series, watching this K-Drama brought back so many memories. And they picked all my favourite episode stories from the original series. The execution of the original story into this version was overall good.