MDL Link: http://mydramalist.com/korean-drama/1103/all-in

Synopsis:

As a kid, all Kim In Ha ever did was follow his uncle around and help him cheat in gambling. As a high school student, he hung out with his friends at the basement of a theater. As Kim In Ha gets to know Choi Jeong Won, a model student and also the son of a very rich family, In Ha tries to tempt him into doing mischevious deeds.

Cast:

Lee Byung-hun as Kim In-ha
Song Hye-kyo as Min Su-yeon
Park Sol-mi as Suh Jin-hee
Ji Sung as Choi Jung-won
Lee Deok Hwa as Choi Do-hwan -Choi Jung-won's father
Seon Woo Eun Sook as Yoon Hye-sun - Choi Jung-won's mother
Fueki Yuko - Lie Ochida
Kim Tae-yeon - Jenny
Heo Joon-ho - Yoo Jong-ku
Park Jun-hee
Han Ji-min - Young Su-yeon
Jin Goo - Young In-ha
Choi Jeong-won - Jeong Ae

Title: 올인 / All In (Ol in)
Genre: Drama, Romance, Crime
Episodes: 24
Broadcast network: SBS
Broadcast period: 2003-Jan-15 to 2003-Apr-03
Air time: Wednesday & Thursday 21:55

Have you watched this? Do you plan to?

See above Synopsis and click on the MDL link for stats, recommendations and reviews.
Guess what? This drama is on my plan to watch list :D I've already seen a little bits of this drama on Arirang TV but I want to watch the whole drama :)
I hope this is good I bought the original DVD of this series
I am not sure if I should watch it .I have noticed it for quite an long time already but am very unsure if it is worth watching it. And it seems quite depressing
I watched this drama ages ago. I do remember that is was watch worthy.
I remember watching this when I was just in primary school. Man, those were the days. Production quality definitely loses to the modern Korean dramas we see nowadays. But I feel like it's one of those epic Korean dramas every beginner to Korean drama must watch - part of the 'K-drama education' hahaha. It contains so many quintessential elements of an epic Korean drama - the lead disappearing from the scene because of some huge injustice committed against him and him coming back with a vengeance, the rise from poverty to wealth, etc.