By and large, this is a VERY strong drama - one which begins with a harrowing look at how a simple omission in the legal letter can cause one life to be lost and another to be turned upside down, and proceeds by digging down into the very personal motivations and grievances of the main cast.
While it is not in doubt that Thongkam is ultimately in the right, you can easily see why the other characters saw the opportunity Thai law offered them to cheat him out of his inheritance and took it, only keeping him around for his expertise afterwards - in spite of knowing he would obviously do anything to win it back. After all, the film offers an unvarnished look at the hardscrabble life in rural Thailand, and if you knew nothing about the sheer effort it takes to grow and distribute durians before (and if you are not in that region, why would you?) you would walk away knowing far more.
Further, while one key character - Mo's cousin Jingna - comes across as somewhat idealized, every other character is remarkably grey - even Mo, the antagonist of the story who turns in an EXTREMELY memorable performance for a fairly new actress, can be understood very well, if not condoned. The narrative also gradually peels back layers on Thongkam's lost love Sek, whose death is the inciting incident of the story. Suffice it to say, your opinion on him will likely go through a rollercoaster of emotions with every revelation.
I was quite ready to declare this film one of my favourites of the year - and then the ending unfolded. Sadly, it is exactly the kind of an overblown showdown which cheapens much of what came before it, and wraps up the proceedings in a manner that's simultaneously formulaic and frankly ridiculous. If this film wasn't so strong before, I would have definitely rated it much lower just because of that.