I don't normally go for adventure type games, but I enjoyed the TV series and noted the positive reviews for this so downloaded it from Steam.
The story and characters are the real standout here. From start to finish you get involved, love them or hate them, they are so well written and acted. The story is a kind of parallel to the TV series, with a couple of characters in both.
The graphics are a stylised comic style which works well, the locals feel atmospheric and brooding, danger is never far away.
Combat is effective, as with dialogue you have to act fast and make quick decisions which adds to the atmosphere of tension.
The only negative I could find which has no real impact, is the camera view can mean you are sometimes unsure of the limits of the area.
I'm sure that 99% of people who finished this game would like me be suprised at how good the characters are, particuly the little girl you end up looking after, Clementine, I doubt you will ever care more about a computer character.
I won't do a spoiler, but the final episode.....I quote Vinnie Jones from Lock Stock,
"Its been emotional"