I actually disagree with the comment made by the other user. This one is a pretty good adaptation and actually ties the loose ends that were left hanging in the Kdrama version. The tone of the drama is different. Here things are more serious as compared to it's Korean counterpart. Also few scenes have been shown a little differently as the culture in both the countries happen to be different.
why the hell didn't she turn him in when she had the evidence. That worthless bitch Jong suk doesn't deserve any respect. I absolutely hate him....he destroyed their friendship.
And that's a good thing. Every drama should have it's own essence whichakes it worth a watch. Both of them have revenge but it's pretty different. Also the time period was different so it makes sense it's similar but not the same.
totally depends on what your mood is.