I was quite impressed with this show.
It's centered around the early days of a zombie apocalypse, and those who have to live through it. It adopts an almost documentary style that I found to be particularly effective.
I really enjoy the fact that the characters are always on the run and that no place is safe. The zombie menace is omnipresent and the zombies are actually, you know, deadly and aggressive. Even a lone zombie can be a real handful. It almost feels like a war movie. The characters are clearly shell shocked as the world they used to know collapses around them. Unlike some of the other reviewers, I enjoy the fact that the dialog is minimal, as it better represents the horror these people are living through. In other zombie shows, they'd be drinking lemonade at a farmhouse whilst spending 3/4 of the season endlessly talking about their feelings.
Now granted there is some "cheese", some questionable decision making by the characters, but you can't have a zombie show w/o some of it.
I sincerely hope this continues. It's better than Z-Nation, and miles better than TWD (which I used to love). I have no way of knowing, but appears there's some review "brigading" going on. I'm guessing it's the devoted fans of TWD.