What a funny ride, this drama. As a headache-free tv-show, this drama never intends to get uselessly complicated and simply provide a pure entertainment. It's easy to follow yet interesting, as the plot revenge emerges to link the funny cons and tricks to the lovely characters.
And while some villains just can't offer much in the balance against "the good guys", some others are scheming quite the challenge, which offers a good counterpart from the con artists and never gets boring. To me, this drama succeed in making the intentions of every character very clear, but while keeping the tricks used as the mystery element to keep the viewers stuck on the show. Since the show remain simple and accessible, it works quite well even if here and there you end up finding some flaws as the plot favors the main characters a bit too much.
Still, to get the show this enjoyable while avoiding some grandiloquent and over-the-top devices and twists is the sign of a skillfull director and staff, loving what they do and showing it. This is particulary true in this drama, when everyone on screen seems to have fun.
Now, maybe that's exactly what others may find lacking in this drama : a more powerful scenario with more entanglements, pressure or challenges but honestly I'm not that sure, for myself, that I would have loved the show if it was planned as such.
There you have it : a good drama about con artists should be able to con its viewers into thinking that it was at least that good.
I fell for it almost all the way so, you've been warned : you could also get conned into loving this drama.