The Good
(+) Has a nice humorous approach to detective work (though can sometimes get a bit too much)
(+) The interactions between the main duo and the other supporting cast members can be quite entertaining
(+) Opening is cool

The Bad
(-) Relationship between main duo is left mostly superficial and unexplored.
(-) Supporting cast has can be entertaining, but aren't fleshed out as characters and are mostly background noise.
(-) Main love interest of the hero has a shoehorned romance with him that isn't developed much.
(-) Police work, investigation and other profession related details are overlooked often.
(-) Main villain is unimpressive and cliche. Because listening to classical music is what all the cool bad guys do nowadays.

Final Verdict
The drama is entertaining if you want to watch something without thinking much. If you expect cool villains, meaningful romance or accurate police work, this isn't for you.