I like it! If you watch it for entertainment then it is perfect BUT it also has lots of plotholes and You can find faults in the story...

Like some things are really funny and not practical at all... no one is that clumsy or thoughtless the way they show both of the main characters...

BUT overall if you put practical & logical mind aside, it is one of the good action series.

The casting is good, Both of the main leads, Kim Geon Woo & Hong Woo Jin, Mr. Choi's character, and all the supporting characters did a good job with their acting...

The action scenes were not natural or practical... No matter how good Boxer you are you just can't beat tons of fighters who only kill or beat... It's just not practical... some fight scenes remind me of "My Name" BUT not too much.

One more thing the elders teach the kids how to fight with knives in a day... IN A DAY! LOL... they are boxers, not a robot... come on?

When you know who you fighting, you only defeat two of his man and NOT kill them... and then you just Chill & celebrate instead of planning your next move... WTF You know he is a loan shark, who has people in his pocket and you are just a boxer... ohh come on!?

AND when you are a professional Bloodhound before Lee Doo Young you leave your family photo in that place while your wife is pregnant and Hwang Yang Jung goes to his cafe like a regular Friday.... what do you expect?

I like the main leads friendship the most... They became friends very naturally... The duo has a perfect balance b/w a goofy and cute personality one talks non-stop and the other one listens.

I really really love Woo Do Hwan's character ? His innocent & cute character reminds me of his The King: Eternal Monarch Character Jo Eun-seob.

About Kim Hyeon Joo's character... She was like I will fight for people and all then she just RUN AWAY.. that too when his one and only family get murdered?

In starting they show her as a cold personality who wants what she wants but after Mr. Choi's death. She was like I can't handle it... I'm just a lit girl... I want peace... instead of revenge? That doesn't go with the personality she had before.

Overall it is worth watching once, I like it even tho some things were not practical. it's a fictional story so you can also put that aside.