This is the typical show in which each episode it's a new case to solve, you won't get bored because it's fun to watch, the storyline is interesting, the characters are well defined, it has a great production and you can even learn some things about science, so it's a sort of educational show as well (assuming the trustworthiness of the facts that each episode presents)

I also have to say that for a more mature or demanding spectator the show lacks of some things, and with such a great cast and production they fail on making an unforgettable show like those that you considered a "must watch" and that you recommend to everybody

Anyway... my suggestion is:
If you have some other good dorama recommendation then don't watch it because you wont miss anything, and if you dont know what to watch then give it a try, at least it will amuse you.