This drama is amazingly good.
I don't really want to write this review because I might not do it justice; how do I express the wonder and elegance that is Money Flower? I'll try
Money Flower has some classic 'makjang' elements, chief among them being revenge and multiple birth secrets. I hope you won't be alarmed by my use of the word 'makjang' no need for you to imagine over the top plot twists or crazy hairpin bend plot development; no, not at all. Money Flower is so elegant, sophisticated, intellectual, watching it is like listening to a concerto, there are many lulling mellifluous moments where the plot is humming along beautifully until it comes to a crescendo which will leave you awestruck and marvelling at the wonderful storytelling.
This script is so tightly woven there is absolutely no room for you as a viewer to lose interest, when you're not riveted by the plot, you'll find yourself admiring the setting, the scenery, the camera work, the lighting, the beautiful people and costumes, there is an incredible attention to detail that was exercised in the making of this drama.

The story of revenge is handled in an intellectual manner, like a chess game it's methodical and well thought out, moves are calculated well in advance, there is very little room for error. The messed up family dynamic is shown to the viewer by the progression of the story and in flashbacks, you never feel as though the drama is telling you something, it simply shows you people's actions and the consequences of those actions.
The overriding theme in this drama is the love of money being the root of evil, as well as revenge and its consequences.

The cast is all excellent and well matched to their roles.
Jang Hyuk carries this show to such levels of acting excellence that I'm inspired to watch ALL his work. I've always been a fan but now I'll probably become a stalker, he's that good. He literally had no expression on his face most of the time and yet you knew exactly what he was feeling at any given moment, his eyes are so expressive, and the minor, barely perceptible shifts in expression were equivalent to a huge grin or frown in their impact. just wow.
The conclusion of his story is cathartic and you can feel his relief and the twenty year old burden being lifted off his shoulders.

Lee Mi Sook perfectly portrayed the power hungry yet fundamentally insecure Mal Ran, she is the perfect example of someone who has all their priorities mixed up.

Park Se Young is good as Mo Hyun, she didn't need to be epic so her quiet, simple straightforward demeanour was just perfect for the role.

Jang Seung Jo is wonderful in his role of Bu Cheon. Next to Jang Hyuk this is the performance and storyline that hit a chord with me. Bu Cheon is so pitiful in that the deck is stacked against him even before he is born, his mother's machinations make it impossible for him to chose his own path in life and ultimately to be happy. Jang Seung Jo managed to convey a sad cheerfulness that broke my heart every time, his acting is really great in this drama.

Finally we come to the root of all the evil in the Jang family: Lee Soon Jae as Chairman Jang. This man is diabolical and will stop at absolutely nothing to get what he wants which is to create a lasting legacy of himself into perpetuity, he is so narcissistic. He uses his company that he founded to manipulate his children and grandchildren, holding the presidency as a carrot stick to keep everyone in line, he employs some very heartless tactics, and is overall an extremely ODIOUS man!

The music is beautiful, beautiful, beautiful.

Overall 10 out of 10. A splendid piece of entertainment.