I really loved this series. I have watched each episode about a million times each.
I don't think they could have chosen any better actors. As they fit their roles perfectly. The problem I have is with the screen writing. I really like the way they wrote the series. However they did not portray the relationship between Pha and Wayo well.
In the novel the character of Pha's attitude is a mixture of Forth and Pha.
However we don't get to see that in this series, as the screenwriters cut or changed those scenes. (Probably to make the series more PG.)
Now let's talk about the last episode.
They really ruined it. Those two scenes were the climax of the whole story. One scene was heartbreaking, the other incredibly satisfying. And they ruined it.
I do reccomend the series. Like I wrote before I have watched it over and over again. Just don't read the novel first and if you did be very open minded.