The first thing you need to know is that Zombie Hunter was never finished. And it probably will never be. Regardless of this fact I think it's worth the read. The story really isn't special. It starts off really good, but then it turns out to be quite as expected. So, why do I think you should read Zombie Hunter, an unfinished manhwa? The art is outstanding. I'm not an expert, and all I can say is that I really enjoyed Zombie Hunter on the visual level. The fight scenes - awesome. Sorry about my limited vocabulary use. Toshio, the main character is really great. He kicks ass,has a strong survival instinct, as well as a killer instinct. As a character he seems promising from chapter 01 to chapter 17, when 'the story' takes over the zombie hunter.
The pages you read from chapter 17 to the last chapter show why the author dropped Zombie Hunter. It becomes diluted, has no depth, and you can witness a lack of inspiration.
To sum it up, if you like fight scenes, blood, monsters and if you like them drawn well, do read Zombie Hunter. If you can enjoy a potentially amazing character do read Zombie Hunter. It's short. Read it.